| Year |
Citation |
Score |
| 2022 |
Shiomi S, Wilailak K, Soutome W, Takayama H, Kitajima M, Ishikawa H. Asymmetric Total Synthesis and Structure Elucidation of Huperzine H. The Journal of Organic Chemistry. PMID 35040311 DOI: 10.1021/acs.joc.1c02672 |
0.458 |
|
| 2020 |
Takayama H. Total Syntheses of Lycopodium and Monoterpenoid Indole Alkaloids Based on Biosynthesis-Inspired Strategies. Chemical & Pharmaceutical Bulletin. 68: 103-116. PMID 32009077 DOI: 10.1248/Cpb.C19-00872 |
0.337 |
|
| 2019 |
Kawabata H, Hirama T, Yanagisawa T, Sato K, Kogure N, Kitajima M, Takayama H. Asymmetric Total Synthesis of Biphenylquinolizidine Alkaloids 4″--Demethyllythridine and 14--4″--Demethyllythridine. Organic Letters. PMID 31524399 DOI: 10.1021/Acs.Orglett.9B02962 |
0.343 |
|
| 2019 |
Saito A, Kogure N, Kitajima M, Takayama H. Total Synthesis of (-)-14-Hydroxygelsenicine and Six Biogenetically Related Alkaloids. Organic Letters. PMID 31403318 DOI: 10.1021/Acs.Orglett.9B02703 |
0.349 |
|
| 2019 |
Tan MA, Takayama H. Recent Progress in the Chemistry of Pandanus Alkaloids. The Alkaloids. Chemistry and Biology. 82: 1-28. PMID 30850030 DOI: 10.1016/Bs.Alkal.2018.12.001 |
0.469 |
|
| 2015 |
El-Shorbagi AA, Abdel-Moty SG, Ahmed AN, Takayama H, Kitajima M, Aimi N, Sakai S. The antiviral (RNA & DNA) profile of some incomplete C-nucleosides inspired from natural ß-carboline (pyrido [3,4-b] indole) scaffold; pharmacology of the intermediates in the total synthesis Der Pharma Chemica. 7: 87-92. |
0.447 |
|
| 2014 |
Tan MA, Villacorta RA, Alejandro JD, Takayama H. Iridoids and a norsesquiterpenoid from the leaves of Villaria odorata. Natural Product Communications. 9: 1229-30. PMID 25918779 |
0.428 |
|
| 2014 |
Wibowo A, Ahmat N, Hamzah AS, Latif FA, Norrizah JS, Khong HY, Takayama H. Identification and biological activity of secondary metabolites from Dryobalanops beccarii Phytochemistry Letters. 9: 117-122. DOI: 10.1016/J.Phytol.2014.05.001 |
0.376 |
|
| 2014 |
Tan MA, Concepcion CNL, Alejandro GJD, Takayama H. Chemotaxonomic relevance of the constituents from the leaves of Rothmannia merrillii Journal of Chemical and Pharmaceutical Research. 6: 779-781. |
0.395 |
|
| 2012 |
Harada M, Asaba KN, Iwai M, Kogure N, Kitajima M, Takayama H. Asymmetric total synthesis of an iboga-type indole alkaloid, voacangalactone, newly isolated from Voacanga africana. Organic Letters. 14: 5800-3. PMID 23131084 DOI: 10.1021/ol3027945 |
0.3 |
|
| 2012 |
Wibowo A, Ahmat N, Hamzah AS, Low AL, Mohamad SA, Khong HY, Sufian AS, Manshoor N, Takayama H. Malaysianol B, an oligostilbenoid derivative from Dryobalanops lanceolata. Fitoterapia. 83: 1569-75. PMID 22982329 DOI: 10.1016/J.Fitote.2012.09.004 |
0.379 |
|
| 2012 |
Tan MA, Nonato MG, Kogure N, Kitajima M, Takayama H. Secondary metabolites from Pandanus simplex Biochemical Systematics and Ecology. 40: 4-5. DOI: 10.1016/j.bse.2011.09.001 |
0.373 |
|
| 2011 |
Kogure N, Katsuta N, Kitajima M, Takayama H. Two new alkaloids from Crinum asiaticum var. sinicum. Chemical & Pharmaceutical Bulletin. 59: 1545-8. PMID 22130378 DOI: JST.JSTAGE/cpb/59.1545 |
0.305 |
|
| 2011 |
Bungihan ME, Tan MA, Kitajima M, Kogure N, Franzblau SG, Dela Cruz TEE, Takayama H, Nonato MG. Bioactive metabolites of Diaporthe sp. P133, an endophytic fungus isolated from Pandanus amaryllifolius Journal of Natural Medicines. 65: 606-609. PMID 21394664 DOI: 10.1007/S11418-011-0518-X |
0.448 |
|
| 2011 |
Yamada Y, Kitajima M, Kogure N, Wongseripipatana S, Takayama H. Seven new monoterpenoid indole alkaloids from Gelsemium elegans. Chemistry, An Asian Journal. 6: 166-73. PMID 20960496 DOI: 10.1002/asia.201000538 |
0.342 |
|
| 2010 |
Tan MA, Kitajima M, Kogure N, Nonato MG, Takayama H. Isolation of pandamarilactonine-H from the roots of Pandanus amaryllifolius and synthesis of epi -pandamarilactonine-H Journal of Natural Products. 73: 1453-1455. PMID 20701299 DOI: 10.1021/np1003998 |
0.466 |
|
| 2010 |
Takayama H. Isolation, structure elucidation, and asymmetric synthesis of biologically active new lycopodium alkaloids Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry. 68: 457-469. DOI: 10.5059/yukigoseikyokaishi.68.457 |
0.314 |
|
| 2010 |
Tan MA, Kitajima M, Kogure N, Nonato MG, Takayama H. New pyrrolidine alkaloids from the roots of Pandanus amaryllifolius Tetrahedron Letters. 51: 4143-4146. DOI: 10.1016/j.tetlet.2010.05.150 |
0.462 |
|
| 2010 |
Tan MA, Kitajima M, Kogure N, Nonato MG, Takayama H. Isolation and total syntheses of two new alkaloids, dubiusamines-A, and -B, from Pandanus dubius Tetrahedron. 66: 3353-3359. DOI: 10.1016/j.tet.2010.02.073 |
0.48 |
|
| 2010 |
Takayama H, Ishikawa H, Kitajima M, Aimi N. ChemInform Abstract: Formation of an Unusual Dimeric Compound (IV) by Lead Tetraacetate Oxidation of a Corynanthe-Type Indole Alkaloid, Mitragynine (I). Cheminform. 33: no-no. DOI: 10.1002/chin.200252204 |
0.61 |
|
| 2010 |
Takayama H, Ichikawa T, Kitajima M, Aimi N, Lopez D, Nonato MG. ChemInform Abstract: A New Alkaloid, Pandanamine; Finding of an Anticipated Biogenetic Intermediate in Pandanus amaryllifolius Roxb. Cheminform. 32: no-no. DOI: 10.1002/chin.200129184 |
0.518 |
|
| 2010 |
Takayama H, Kurihara M, Kitajim M, Said IM, Aimi N. ChemInform Abstract: Structure Elucidation and Chiral-Total Synthesis of a New Indole Alkaloid, (-)-9-Methoxymitralactonine, Isolated from Mitragyna speciosa in Malaysia. Cheminform. 31: no-no. DOI: 10.1002/chin.200032172 |
0.321 |
|
| 2010 |
TAKAYAMA H, KURIHARA M, KITAJIMA M, SAID IM, AIMI N. ChemInform Abstract: New Indole Alkaloids from the Leaves of Malaysian Mitragyna speciosa. Cheminform. 29: no-no. DOI: 10.1002/chin.199842220 |
0.533 |
|
| 2010 |
KITAJIMA M, NAKAMURA M, WATANABE A, TAKAYAMA H, AIMI N. ChemInform Abstract: Synthesis and Absolute Configuration of 9-β-D-Glucosyloxycamptothecin, a New Gluco Camptothecin Isolated from Ophiorrhiza pumila Regenerated Plants. Cheminform. 29: no-no. DOI: 10.1002/chin.199820256 |
0.505 |
|
| 2010 |
TAKAYAMA H, SUBHADHIRASAKUL S, OHMORI O, KITAJIMA M, PONGLUX D, AIMI N. ChemInform Abstract: Hunterioside B, a Disaccharide Carrying Monoterpenoid Indole Alkaloid, from Hunteria zeylanica Cheminform. 29: no-no. DOI: 10.1002/chin.199818237 |
0.453 |
|
| 2010 |
KITAJIMA M, MASUMOTO S, TAKAYAMA H, AIMI N. ChemInform Abstract: Isolation and Partial Synthesis of 3(R)- and 3(S)-Deoxypumiloside; Structural Revision of the Key Metabolite from the Camptothecin Producing Plant, Ophiorrhiza pumila. Cheminform. 28: no-no. DOI: 10.1002/chin.199737242 |
0.509 |
|
| 2010 |
AIMI N, SHIMIZU T, SADA H, TAKAYAMA H, SAKAI S, WONGSERIPIPATANA S, PONGLUX D. ChemInform Abstract: Structures of Us-7 and Us-8: A New Type of Oxindole Alkaloids Isolated from Uncaria attenuata Korth. Cheminform. 28: no-no. DOI: 10.1002/chin.199724231 |
0.544 |
|
| 2010 |
TAKAYAMA H, MIYABE Y, SHITO T, KITAJIMA M, AIMI N. ChemInform Abstract: Biomimetic Synthesis of Nauclea Indole Alkaloids, Naucleidinal, and 3- epi-Naucleidinal, by Stereoselective Rearrangement of Strictosamide and the Vincoside Lactam Aglycones. Cheminform. 28: no-no. DOI: 10.1002/chin.199721227 |
0.511 |
|
| 2010 |
TAKAYAMA H, MAEDA M, OHBAYASHI S, KITAJIMA M, SAKAI S, AIMI N. ChemInform Abstract: The First Total Synthesis of (-)-Mitragynine, an Analgesic Indole Alkaloid in Mitragyna speciosa. Cheminform. 27: no-no. DOI: 10.1002/chin.199615245 |
0.507 |
|
| 2010 |
SUBHADHIRASAKUL S, TAKAYAMA H, MIYABE Y, AIMI N, PONGLUX D, SAKAI S. ChemInform Abstract: New Corymine-Related Indole Alkaloids from Hunteria zeylanica in Thailand. Cheminform. 26: no-no. DOI: 10.1002/chin.199535266 |
0.511 |
|
| 2010 |
SUBHADHIRASAKUL S, TAKAYAMA H, AIMI N, PONGLUX D, SAKAI S. ChemInform Abstract: Novel Indole Alkaloids from the Leaves of Rauwolfia sumatrana JACK. in Thailand. Cheminform. 26: no-no. DOI: 10.1002/chin.199511264 |
0.521 |
|
| 2010 |
TAKAYAMA H, TOMINAGA Y, KITAJIMA M, AIMI N, SAKAI S. ChemInform Abstract: First Synthesis of the Novel Gelsemium Alkaloids, Gelselegine (V), Gelsenicine (VI), and Gelsedine (VII) Using a Biomimetic Approach. Cheminform. 26: no-no. DOI: 10.1002/chin.199506240 |
0.455 |
|
| 2010 |
SUBHADHIRASAKUL S, AIMI N, TAKAYAMA H, PONGLUX D, SAKAI S. ChemInform Abstract: Hunterioside (I), First Biose Bound Monoterpenoid Indole Alkaloid from Hunteria zeylanica. Cheminform. 25: no-no. DOI: 10.1002/chin.199449257 |
0.457 |
|
| 2010 |
TAKAYAMA H, KOIKE T, AIMI N, SAKAI S. ChemInform Abstract: A Convenient Method for Converting Saturated Aldehydes to α,. beta.-Unsaturated Aldehydes Elongated by One Carbon Atom. The Pd(II)- Promoted Oxidation of Methyl Enol Ethers. Cheminform. 23: no-no. DOI: 10.1002/chin.199233127 |
0.426 |
|
| 2010 |
TAKAYAMA H, KITAJIMA M, SUDA S, AIMI N, SAKAI S, ENDRESS S, STOECKIGT J. ChemInform Abstract: Structure and Synthesis of a New Indole Alkaloid, 19(S)-Hydroxy-Nb- methylraumacline, Obtained by the Biotransformation of Ajmaline in Plant Cell Cultures of Rauwolfia serpentina Benth. Cheminform. 23: no-no. DOI: 10.1002/chin.199231266 |
0.524 |
|
| 2010 |
TAKAYAMA H, PHISALAPHONG C, KITAJIMA M, AIMI N, SAKAI S. ChemInform Abstract: Efficient Synthetic Pathway to the Macroline-Type Indole Alkaloids, Talcarpine (IXa) and Alstonerine (XI) from Ajmaline. Cheminform. 22: no-no. DOI: 10.1002/chin.199121276 |
0.465 |
|
| 2008 |
Toriizuka Y, Kinoshita E, Kogure N, Kitajima M, Ishiyama A, Otoguro K, Yamada H, Omura S, Takayama H. New lycorine-type alkaloid from Lycoris traubii and evaluation of antitrypanosomal and antimalarial activities of lycorine derivatives. Bioorganic & Medicinal Chemistry. 16: 10182-9. PMID 19013823 DOI: 10.1016/J.Bmc.2008.10.061 |
0.302 |
|
| 2008 |
Kaewamatawong R, Kitajima M, Kogure N, Takayama H. Flavonols from Bauhinia malabarica. Journal of Natural Medicines. 62: 364-5. PMID 18414979 DOI: 10.1007/S11418-008-0249-9 |
0.307 |
|
| 2008 |
Tan MA, Takayama H, Aimi N, Kitajima M, Franzblau SG, Nonato MG. Antitubercular triterpenes and phytosterols from Pandanus tectorius Soland. var. laevis Journal of Natural Medicines. 62: 232-235. PMID 18404330 DOI: 10.1007/S11418-007-0218-8 |
0.604 |
|
| 2007 |
Hakim EH, Achmad SA, Juliawaty LD, Makmur L, Syah YM, Aimi N, Kitajima M, Takayama H, Ghisalberti EL. Prenylated flavonoids and related compounds of the Indonesian Artocarpus (Moraceae) (Journal of Natural Medicines 60, (161-184) DOI: 10.1007/s11418-006- 0048-0) Journal of Natural Medicines. 61: 229. DOI: 10.1007/s11418-006-0106-7 |
0.477 |
|
| 2006 |
Hakim EH, Achmad SA, Juliawaty LD, Makmur L, Syah YM, Aimi N, Kitajima M, Takayama H, Ghisalberti EL. Prenylated flavonoids and related compounds of the Indonesian Artocarpus (Moraceae). Journal of Natural Medicines. 60: 161-184. PMID 29435895 DOI: 10.1007/S11418-006-0106-7 |
0.577 |
|
| 2006 |
Takayama H, Misawa K, Okada N, Ishikawa H, Kitajima M, Hatori Y, Murayama T, Wongseripipatana S, Tashima K, Matsumoto K, Horie S. New procedure to mask the 2,3-pi bond of the indole nucleus and its application to the preparation of potent opioid receptor agonists with a Corynanthe skeleton. Organic Letters. 8: 5705-8. PMID 17134252 DOI: 10.1021/Ol062173K |
0.457 |
|
| 2006 |
Usman H, Hakim EH, Harlim T, Jalaluddin MN, Syah YM, Achmad SA, Takayama H. Cytotoxic chalcones and flavanones from the tree bark of Cryptocarya costata. Zeitschrift Fã¼R Naturforschung. C, Journal of Biosciences. 61: 184-8. PMID 16729574 DOI: 10.1515/Znc-2006-3-405 |
0.365 |
|
| 2006 |
Kitajima M, Nakamura T, Kogure N, Ogawa M, Mitsuno Y, Ono K, Yano S, Aimi N, Takayama H. Isolation of gelsedine-type indole alkaloids from Gelsemium elegans and evaluation of the cytotoxic activity of Gelsemium alkaloids for A431 epidermoid carcinoma cells Journal of Natural Products. 69: 715-718. PMID 16643063 DOI: 10.1021/Np068071K |
0.573 |
|
| 2006 |
Matsumoto K, Takayama H, Ishikawa H, Aimi N, Ponglux D, Watanabe K, Horie S. Partial agonistic effect of 9-hydroxycorynantheidine on μ-opioid receptor in the guinea-pig ileum Life Sciences. 78: 2265-2271. PMID 16266723 DOI: 10.1016/J.Lfs.2005.09.030 |
0.569 |
|
| 2006 |
Takayama H, Katakawa K, Kitajima M, Yamaguchi K. Three New Phlegmarine-Type Lycopodium Alkaloids, Lycoposerramines-X, -Y and -Z, Having a Nitrone Residue, from Lycopodium serratum Heterocycles. 69: 223-229. DOI: 10.3987/Com-06-S(O)16 |
0.347 |
|
| 2006 |
Syah YM, Achmad SA, Aimi N, Hakim EH, Juliawaty LD, Takayama H. Two prenylated flavones from the tree bark of Artocarpus lanceifolius Zeitschrift Fur Naturforschung - Section B Journal of Chemical Sciences. 61: 1134-1137. |
0.396 |
|
| 2005 |
Kitajima M, Fujii N, Yoshino F, Sudo H, Saito K, Aimi N, Takayama H. Camptothecins and two new monoterpene glucosides from Ophiorrhiza liukiuensis Chemical and Pharmaceutical Bulletin. 53: 1355-1358. PMID 16205003 DOI: 10.1248/cpb.53.1355 |
0.532 |
|
| 2005 |
Matsumoto K, Horie S, Takayama H, Ishikawa H, Aimi N, Ponglux D, Murayama T, Watanabe K. Antinociception, tolerance and withdrawal symptoms induced by 7-hydroxymitragynine, an alkaloid from the Thai medicinal herb Mitragyna speciosa Life Sciences. 78: 2-7. PMID 16169018 DOI: 10.1016/J.Lfs.2004.10.086 |
0.576 |
|
| 2005 |
Niampoka C, Suttisri R, Bavovada R, Takayama H, Aimi N. Potentially cytotoxic triterpenoids from the root bark of Siphonodon celastrineus Griff Archives of Pharmacal Research. 28: 546-549. PMID 15974440 DOI: 10.1007/Bf02977756 |
0.538 |
|
| 2005 |
Horie S, Koyama F, Takayama H, Ishikawa H, Aimi N, Ponglux D, Matsumoto K, Murayama T. Indole alkaloids of a Thai medicinal herb, Mitragyna speciosa, that has opioid agonistic effect in guinea-pig ileum Planta Medica. 71: 231-236. PMID 15770543 DOI: 10.1055/S-2005-837822 |
0.571 |
|
| 2005 |
Katakawa K, Kitajima M, Aimi N, Seki H, Yamaguchi K, Furihata K, Harayama T, Takayama H. Structure elucidation and synthesis of lycoposerramine-B, a novel oxime-containing Lycopodium alkaloid from Lycopodium serratum Thunb. The Journal of Organic Chemistry. 70: 658-63. PMID 15651814 DOI: 10.1021/jo0483825 |
0.551 |
|
| 2004 |
Kang TH, Murakami Y, Takayama H, Kitajima M, Aimi N, Watanabe H, Matsumoto K. Protective effect of rhynchophylline and isorhynchophylline on in vitro ischemia-induced neuronal damage in the hippocampus: Putative neurotransmitter receptors involved in their action Life Sciences. 76: 331-343. PMID 15531384 DOI: 10.1016/J.Lfs.2004.08.012 |
0.412 |
|
| 2004 |
Kitajima M, Hashimoto KI, Sandoval M, Aimi N, Takayama H. New oleanan-type triterpene and cincholic acid glycosides from Peruvian "Uña de Gato" (Uncaria tomentosa) Chemical and Pharmaceutical Bulletin. 52: 1258-1261. PMID 15467250 DOI: 10.1248/cpb.52.1258 |
0.528 |
|
| 2004 |
Takayama H, Mori I, Kitajima M, Aimi N, Lajis NH. New type of trimeric and pentameric indole alkaloids from Psychotria rostrata Organic Letters. 6: 2945-2948. PMID 15330654 DOI: 10.1021/ol048971x |
0.565 |
|
| 2004 |
Suzuki KT, Mandal BK, Katagiri A, Sakuma Y, Kawakami A, Ogra Y, Yamaguchi K, Sei Y, Yamanaka K, Anzai K, Ohmichi M, Takayama H, Aimi N. Dimethylthioarsenicals as arsenic metabolites and their chemical preparations. Chemical Research in Toxicology. 17: 914-21. PMID 15257616 DOI: 10.1021/tx049963s |
0.412 |
|
| 2004 |
Takayama H, Ishikawa H, Kitajima M, Aimi N, Aji BM. A new 9-methoxyyohimbine-type indole alkaloid from Mitragyna africanus Chemical and Pharmaceutical Bulletin. 52: 359-361. PMID 14993762 DOI: 10.1248/Cpb.52.359 |
0.648 |
|
| 2004 |
Matsumoto K, Horie S, Ishikawa H, Takayama H, Aimi N, Ponglux D, Watanabe K. Antinociceptive effect of 7-hydroxymitragynine in mice: Discovery of an orally active opioid analgesic from the Thai medicinal herb Mitragyna speciosa Life Sciences. 74: 2143-2155. PMID 14969718 DOI: 10.1016/J.Lfs.2003.09.054 |
0.615 |
|
| 2004 |
Ogura J, Mitamura M, Someya A, Shimamura K, Takayama H, Aimi N, Horie S, Murayama T. Mesaconitine-induced relaxation in rat aorta: Role of Na +/Ca2+ exchangers in endothelial cells European Journal of Pharmacology. 483: 139-146. PMID 14729101 DOI: 10.1016/J.Ejphar.2003.10.022 |
0.394 |
|
| 2004 |
Yamazaki Y, Kitajima M, Arita M, Takayama H, Sudo H, Yamazaki M, Aimi N, Saito K. Biosynthesis of Camptothecin. In Silico and in Vivo Tracer Study from [1-13C]Glucose Plant Physiology. 134: 161-170. PMID 14657405 DOI: 10.1104/Pp.103.029389 |
0.449 |
|
| 2004 |
Aimi N, Ariffin J, Takayama H, Kitajima M, Kaneko C. Density Functional Theory Study of the Preferred Conformation of Geissoschizine Heterocycles. 63: 663. DOI: 10.3987/Com-03-9971 |
0.444 |
|
| 2004 |
Hakim EH, Achmad SA, Aimi N, Indrayanto G, Kitajima M, Makmur L, Surya MD, Syah YM, Takayama H. Regioselective glucosylation of oxyresveratrol by cell suspension cultures of Solanum mammosum Journal of Chemical Research. 2004: 706-707. DOI: 10.3184/0308234043431825 |
0.465 |
|
| 2003 |
Kitajima M, Urano A, Kogure N, Takayama H, Aimi N. New oxindole alkaloids and iridoid from carolina jasmine (Gelsemium sempervirens AIT. f.) Chemical and Pharmaceutical Bulletin. 51: 1211-1214. PMID 14519934 DOI: 10.1248/Cpb.51.1211 |
0.552 |
|
| 2003 |
Takayama H, Katakawa K, Kitajima M, Yamaguchi K, Aimi N. Ten new Lycopodium alkaloids having the lycopodane skeleton isolated from Lycopodium serratum Thunb. Chemical & Pharmaceutical Bulletin. 51: 1163-9. PMID 14519922 |
0.509 |
|
| 2003 |
Watanabe H, Zhao Q, Matsumoto K, Tohda M, Murakami Y, Zhang SH, Kang TH, Mahakunakorn P, Maruyama Y, Sakakibara I, Aimi N, Takayama H. Pharmacological evidence for antidementia effect of Choto-san (Gouteng-san), a traditional Kampo medicine Pharmacology Biochemistry and Behavior. 75: 635-643. PMID 12895681 DOI: 10.1016/S0091-3057(03)00109-6 |
0.459 |
|
| 2003 |
Syah YM, Aminah NS, Hakim EH, Aimi N, Kitajima M, Takayama H, Achmad SA. Two oligostilbenes, cis- and trans-diptoindonesin B, from Dryobalanops oblongifolia Phytochemistry. 63: 913-917. PMID 12895539 DOI: 10.1016/S0031-9422(03)00274-7 |
0.494 |
|
| 2003 |
Takayama H, Fujiwara R, Kasai Y, Kitajima M, Aimi N. First asymmetric total synthesis of Us-7 and -8, novel D-seco Corynanthe-type oxindole alkaloids from Uncaria attenuata: structure revision of Us-7 and determination of absolute stereochemistry. Organic Letters. 5: 2967-70. PMID 12889920 DOI: 10.1021/ol035128a |
0.503 |
|
| 2003 |
Kitajima M, Kogure N, Yamaguchi K, Takayama H, Aimi N. Structure reinvestigation of gelsemoxonine, a constituent of Gelsemium elegans, reveals a novel, azetidine-containing indole alkaloid Organic Letters. 5: 2075-2078. PMID 12790532 DOI: 10.1021/ol0344725 |
0.544 |
|
| 2003 |
Yamazaki Y, Urano A, Sudo H, Kitajima M, Takayama H, Yamazaki M, Aimi N, Saito K. Metabolite profiling of alkaloids and strictosidine synthase activity in camptothecin producing plants Phytochemistry. 62: 461-470. PMID 12620359 DOI: 10.1016/S0031-9422(02)00543-5 |
0.455 |
|
| 2003 |
Kitajima M, Hashimoto KI, Yokoya M, Takayama H, Sandoval M, Aimi N. Two new nor-triterpene glycosides from Peruvian "Uña de Gato" (Uncaria tomentosa) Journal of Natural Products. 66: 320-323. PMID 12608878 DOI: 10.1021/Np0203741 |
0.593 |
|
| 2003 |
Husain K, Jantan I, Said IM, Aimi N, Takayama H. Two new methyl chanofruticosinates from Kopsia flavida blume Journal of Asian Natural Products Research. 5: 63-67. PMID 12608641 DOI: 10.1080/1028602031000080487 |
0.537 |
|
| 2003 |
Takayama H, Tsutsumi SI, Kitajima M, Santiarworn D, Liawruangrath B, Aimi N. Gluco-indole alkaloids from Nauclea cadamba in Thailand and transformation of 3α-dihydrocadambine into the indolopyridine alkaloid, 16-carbomethoxynaufoline Chemical and Pharmaceutical Bulletin. 51: 232-233. PMID 12576667 DOI: 10.1248/cpb.51.232 |
0.471 |
|
| 2003 |
Permana D, Lajis NH, Shaari K, Ali AM, Mackeen MMM, Kitajima M, Takayama H, Aimi N. A New Prenylated Hydroquinone from the Roots of Garcinia atroviridis Griff ex T. Anders (Guttiferae) Zeitschrift FüR Naturforschung. B, a Journal of Chemical Sciences. 58: 332-335. DOI: 10.1515/Znb-2003-0414 |
0.561 |
|
| 2003 |
Takayama H, Fujiwara R, Kasai Y, Kitajima M, Aimi N. First asymmetric total synthesis of Us-7 and -8, novel D-seco Corynanthe-type oxindole alkaloids from uncaria attenuata: Structure revision of Us-7 and determination of absolute stereochemistry Organic Letters. 5: 2967-2970. DOI: 10.1021/ol035128a |
0.51 |
|
| 2003 |
Tiew P, Takayama H, Kitajima M, Aimi N, Kokpol U, Chavasiri W. A novel neolignan, mansoxetane, and two new sesquiterpenes, mansonones R and S, from Mansonia gagei Tetrahedron Letters. 44: 6759-6761. DOI: 10.1016/S0040-4039(03)01616-2 |
0.562 |
|
| 2002 |
Hakim EH, Asnizar, Yurnawilis, Aimi N, Kitajima M, Takayama H. Artoindonesianin P, a new prenylated flavone with cytotoxic activity from Artocarpus lanceifolius Fitoterapia. 73: 668-673. PMID 12490227 DOI: 10.1016/S0367-326X(02)00226-5 |
0.569 |
|
| 2002 |
Kobayashi Y, Ogra Y, Ishiwata K, Takayama H, Aimi N, Suzuki KT. Selenosugars are key and urinary metabolites for selenium excretion within the required to low-toxic range Proceedings of the National Academy of Sciences of the United States of America. 99: 15932-15936. PMID 12441402 DOI: 10.1073/Pnas.252610699 |
0.456 |
|
| 2002 |
Kang TH, Murakami Y, Matsumoto K, Takayama H, Kitajima M, Aimi N, Watanabe H. Rhynchophylline and isorhynchophylline inhibit NMDA receptors expressed in Xenopus oocytes European Journal of Pharmacology. 455: 27-34. PMID 12433591 DOI: 10.1016/S0014-2999(02)02581-5 |
0.486 |
|
| 2002 |
Aimi N, Kitajima M, Yokoya M, Takayama H, Sakamoto S, Yamaguchi K. Collision-induced dissociation actualized the H+-promoted reaction as observed in vitro; harman formation from β-carboline-type monoterpenoid glucoindole alkaloids Chemical and Pharmaceutical Bulletin. 50: 1528-1529. PMID 12419926 DOI: 10.1248/Cpb.50.1528 |
0.494 |
|
| 2002 |
Aminah NS, Achmad SA, Aimi N, Ghisalberti EL, Hakim EH, Kitajima M, Syah YM, Takayama H. Diptoindonesin A, a new C-glucoside of ε-viniferin from Shorea seminis (Dipterocarpaceae) Fitoterapia. 73: 501-507. PMID 12385874 DOI: 10.1016/S0367-326X(02)00179-X |
0.568 |
|
| 2002 |
Kitajima M, Yokoya M, Takayama H, Aimi N. Synthesis and absolute configuration of a new 3,4-dihydro-β-carboline- type alkaloid, 3,4-dehydro-5(S)-5-carboxystrictosidine, isolated from Peruvian Uña de Gato (Uncaria tomentosa) Chemical and Pharmaceutical Bulletin. 50: 1376-1378. PMID 12372867 DOI: 10.1002/chin.200314216 |
0.536 |
|
| 2002 |
Takayama H, Ichikawa T, Kitajima M, Nonato MG, Aimi N. Isolation and structure elucidation of two new alkaloids, pandamarilactonine-C and -D, from Pandanus amaryllifolius and revision of relative stereochemistry of pandamarilactonine-A and -B by total synthesis Chemical and Pharmaceutical Bulletin. 50: 1303-1304. PMID 12237561 DOI: 10.1248/cpb.50.1303 |
0.537 |
|
| 2002 |
Takayama H, Arai M, Kitajima M, Aimi N. First Total Synthesis of a Novel Monoterpenoid Isoquinoline Alkaloid, (±)-Alangine Chemical and Pharmaceutical Bulletin. 50: 1141-1143. PMID 12192157 DOI: 10.1002/chin.200303186 |
0.473 |
|
| 2002 |
Kang TH, Matsumoto K, Tohda M, Murakami Y, Takayama H, Kitajima M, Aimi N, Watanabe H. Pteropodine and isopteropodine positively modulate the function of rat muscarinic M1 and 5-HT2 receptors expressed in Xenopus oocyte European Journal of Pharmacology. 444: 39-45. PMID 12191580 DOI: 10.1016/S0014-2999(02)01608-4 |
0.405 |
|
| 2002 |
Kaewamatawong R, Likhitwitayawuid K, Ruangrungsi N, Takayama H, Kitajima M, Aimi N. Novel biflavonoids from the stem bark of Ochna integerrima Journal of Natural Products. 65: 1027-1029. PMID 12141866 DOI: 10.1021/Np010630U |
0.548 |
|
| 2002 |
Takayama H, Ishikawa H, Kitajima M, Aimi N. Formation of an unusual dimeric compound by lead tetraacetate oxidation of a Corynanthe-type indole alkaloid, mitragynine Chemical and Pharmaceutical Bulletin. 50: 960-963. PMID 12130854 DOI: 10.1248/Cpb.50.960 |
0.626 |
|
| 2002 |
Tsuchiya S, Miyashita S, Yamamoto M, Horie S, Sakai SI, Aimi N, Takayama H, Watanabe K. Effect of mitragynine, derived from Thai folk medicine, on gastric acid secretion through opioid receptor in anesthetized rats European Journal of Pharmacology. 443: 185-188. PMID 12044808 DOI: 10.1016/S0014-2999(02)01588-1 |
0.415 |
|
| 2002 |
Takayama H, Ishikawa H, Kurihara M, Kitajima M, Aimi N, Ponglux D, Koyama F, Matsumoto K, Moriyama T, Yamamoto LT, Watanabe K, Murayama T, Horie S. Studies on the synthesis and opioid agonistic activities of mitragynine-related indole alkaloids: Discovery of opioid agonists structurally different from other opioid ligands Journal of Medicinal Chemistry. 45: 1949-1956. PMID 11960505 DOI: 10.1021/Jm010576E |
0.594 |
|
| 2002 |
Ogra Y, Ishiwata K, Takayama H, Aimi N, Suzuki KT. Identification of a novel selenium metabolite, Se-methyl-N-acetylselenohexosamine, in rat urine by high-performance liquid chromatography-inductively coupled plasma mass spectrometry and -electrospray ionization tandem mass spectrometry Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences. 767: 301-312. PMID 11885859 DOI: 10.1016/S1570-0232(01)00581-5 |
0.413 |
|
| 2002 |
Juliawaty LD, Watanabe Y, Kitajima M, Achmad SA, Takayama H, Aimi N. First total synthesis and determination of the absolute configuration of strictifolione, a new 6-(ω-phenylalkenyl)-5,6-dihydro-α-pyrone, isolated from Cryptocarya strictifolia Tetrahedron Letters. 43: 8657-8660. DOI: 10.1016/S0040-4039(02)02181-0 |
0.516 |
|
| 2002 |
Ishikawa H, Takayama H, Aimi N. Dimerization of indole derivatives with hypervalent iodines(III): A new entry for the concise total synthesis of rac- and meso-chimonanthines Tetrahedron Letters. 43: 5637-5639. DOI: 10.1016/S0040-4039(02)01137-1 |
0.622 |
|
| 2002 |
Kitajima M, Yoshida S, Yamagata K, Nakamura M, Takayama H, Saito K, Seki H, Aimi N. Camptothecin-related alkaloids from hairy roots of Ophiorrhiza pumila Tetrahedron. 58: 9169-9178. DOI: 10.1016/S0040-4020(02)01196-1 |
0.448 |
|
| 2001 |
Takayama H, Katakawa K, Kitajima M, Seki H, Yamaguchi K, Aimi N. A new type of lycopodium alkaloid, lycoposerramine-A, from Lycopodium serratum Thunb. Organic Letters. 3: 4165-7. PMID 11784168 DOI: 10.1021/ol0167762 |
0.504 |
|
| 2001 |
Suhartati T, Achmad SA, Aimi N, Hakim EH, Kitajima M, Takayama H, Takeya K. Artoindonesianin L, a new prenylated flavone with cytotoxic activity from Artocarpus rotunda Fitoterapia. 72: 912-918. PMID 11731116 DOI: 10.1016/S0367-326X(01)00343-4 |
0.533 |
|
| 2001 |
Takayama H, Ichikawa T, Kitajima M, Nonato MG, Aimi N. Isolation and characterization of two new alkaloids, norpandamarilactonine-A and -B, from Pandanus amaryllifolius by spectroscopic and synthetic methods Journal of Natural Products. 64: 1224-1225. PMID 11575961 DOI: 10.1021/Np010213H |
0.592 |
|
| 2001 |
Nagakubo J, Tomimatsu T, Kitajima M, Takayama H, Aimi N, Horie T. Characteristics of transport of fluoresceinated methotrexate in rat small intestine Life Sciences. 69: 739-747. PMID 11487087 DOI: 10.1016/S0024-3205(01)01162-6 |
0.447 |
|
| 2001 |
Permana D, Lajis NH, Mackeen MM, Ali AM, Aimi N, Kitajima M, Takayama H. Isolation and bioactivities of constitutents of the roots of Garcinia atroviridis. Journal of Natural Products. 64: 976-9. PMID 11473441 DOI: 10.1021/Np000563O |
0.586 |
|
| 2001 |
Husain K, Jantan I, Kamaruddin N, Said IM, Aimi N, Takayama H. Methyl chanofruticosinates from leaves of Kopsia flavida Blume Phytochemistry. 57: 603-606. PMID 11394866 DOI: 10.1016/S0031-9422(01)00119-4 |
0.535 |
|
| 2001 |
Takayama H, Ishikawa H, Kurihara M, Kitajima M, Sakai SI, Aimi N, Seki H, Yamaguchi K, Said IM, Houghton PJ. Structure revision of mitragynaline, an indole alkaloid in Mitragyna speciosa Tetrahedron Letters. 42: 1741-1743. DOI: 10.1016/S0040-4039(01)00006-5 |
0.658 |
|
| 2001 |
Saito K, Sudo H, Yamazaki M, Koseki-Nakamura M, Kitajima M, Takayama H, Aimi N. Feasible production of camptothecin by hairy root culture of Ophiorrhiza pumila Plant Cell Reports. 20: 267-271. DOI: 10.1007/S002990100320 |
0.51 |
|
| 2001 |
Kitajima M, Hashimoto K, Yokoya M, Takayama H, Aimi N, Sakai S. ChemInform Abstract: A New Gluco Indole Alkaloid, 3,4-Dehydro-5-carboxystrictosidine, from Peruvian Una de Gato (Uncaria tomentosa). Cheminform. 32: no-no. DOI: 10.1002/chin.200111210 |
0.523 |
|
| 2001 |
Takayama H, Aimi N, Sakai S. ChemInform Abstract: Chemical Studies on the Analgesic Indole Alkaloids from the Traditional Medicine (Mitragyna speciosa) Used for Opium Substitute Cheminform. 32: no-no. DOI: 10.1002/chin.200106242 |
0.498 |
|
| 2000 |
Mohamed AFAF, Matsumoto K, Tabata K, Takayama H, Kitajima M, Aimi N, Watanabe H. Effects of Uncaria tomentosa total alkaloid and its components on experimental amnesia in mice: Elucidation using the passive avoidance test Journal of Pharmacy and Pharmacology. 52: 1553-1561. PMID 11197086 DOI: 10.1211/0022357001777612 |
0.497 |
|
| 2000 |
Juliawaty LD, Kitajima M, Takayama H, Achmad SA, Aimi N. A new type of stilbene-related secondary metabolite, idenburgene, from Cryptocarya idenburgensis Chemical and Pharmaceutical Bulletin. 48: 1726-1728. PMID 11086902 DOI: 10.1248/Cpb.48.1726 |
0.597 |
|
| 2000 |
Takayama H, Aimi N, Sakai SI. Chemical studies on the analgesic indole alkaloids from the traditional medicine (Mitragyna speciosa) used for opium substitute Yakugaku Zasshi. 120: 959-967. PMID 11082707 DOI: 10.1248/Yakushi1947.120.10_959 |
0.594 |
|
| 2000 |
Kitajima M, Hashimoto K, Yokoya M, Takayama H, Aimi N, Sakai SI. A new gluco indole alkaloid, 3, 4-dehydro-5-carboxystrictosidine, from Peruvian Uña de Gato (Uncaria tomentosa). Chemical & Pharmaceutical Bulletin. 48: 1410-2. PMID 11045440 DOI: 10.1248/cpb.48.1410 |
0.541 |
|
| 2000 |
Juliawaty LD, Kitajima M, Takayama H, Achmad SA, Aimi N. A 6-substituted-5,6-dihydro-2-pyrone from Cryptocarya strictifolia Phytochemistry. 54: 989-993. PMID 11014303 DOI: 10.1016/S0031-9422(00)00077-7 |
0.509 |
|
| 2000 |
Makmur L, Syamsurizal, Tukiran, Achmad SA, Aimi N, Hakim EH, Kitajima M, Takayama H. Artoindonesianin c, a new xanthone derivative from artocarpus teysmanii Journal of Natural Products. 63: 243-244. PMID 10691717 DOI: 10.1021/Np990220U |
0.578 |
|
| 2000 |
Takayama H, Ichikawa T, Kuwajima T, Kitajima M, Seki H, Ainu N, Nonato MG. Structure characterization, biomimetic total synthesis, and optical purity of two new pyrrolidine alkaloids, pandamarilactonine-A and -B, isolated from Pandanus amaryllifolius Roxb Journal of the American Chemical Society. 122: 8635-8639. DOI: 10.1021/Ja0009929 |
0.391 |
|
| 2000 |
Kitajima M, Hashimoto K, Yokoya M, Takayama H, Aimi N. Two New 19-Hydroxyursolic Acid-type Triterpenes from Peruvian ‘Uña de Gato’ ( Uncaria tomentosa ) Tetrahedron. 56: 547-552. DOI: 10.1016/S0040-4020(99)01048-0 |
0.457 |
|
| 2000 |
Takayama H, Watanabe F, Kuroda A, Kitajima M, Aimi N. Formation of a Novel 1-Aza-tricyclo[5.3.0.04,8]decane System via Tandem Radical Cyclization of a Tryptophan Derivative Tetrahedron. 56: 6457-6461. DOI: 10.1016/S0040-4020(00)00601-3 |
0.429 |
|
| 2000 |
Takayama H, Kurihara M, Kitajima M, Said IM, Aimi N. Structure elucidation and chiral-total synthesis of a new indole alkaloid, (-)-9-methoxymitralactonine, isolated from Mitragyna speciosa in Malaysia Tetrahedron. 56: 3145-3151. DOI: 10.1016/S0040-4020(00)00235-0 |
0.598 |
|
| 1999 |
Takayama H, Kurihara M, Kitajima M, Said IM, Aimi N. Isolation and Asymmetric Total Synthesis of a New Mitragyna Indole Alkaloid, (-)-Mitralactonine. The Journal of Organic Chemistry. 64: 1772-1773. PMID 11674259 DOI: 10.1021/Jo9823644 |
0.604 |
|
| 1999 |
Fujiwara M, Kodama EN, Okamoto M, Tokuhisa K, Ide T, Hanasaki Y, Katsuura K, Takayama H, Aimi N, Mitsuya H, Shigeta S, Konno K, Yokota T, Baba M. Characterization of human immunodeficiency virus type 1 strains resistant to the non-nucleoside reverse transcriptase inhibitor RD4-2217. Antiviral Chemistry & Chemotherapy. 10: 315-20. PMID 10628806 DOI: 10.1177/095632029901000602 |
0.495 |
|
| 1999 |
Masumiya H, Saitoh T, Tanaka Y, Horie S, Aimi N, Takayama H, Tanaka H, Shigenobu K. Effects of hirsutine and dihydrocorynantheine on the action potentials of sino-atrial node, atrium and ventricle. Life Sciences. 65: 2333-41. PMID 10597888 DOI: 10.1016/S0024-3205(99)00500-7 |
0.485 |
|
| 1999 |
Yamamoto LT, Horie S, Takayama H, Aimi N, Sakai S, Yano S, Shan J, Pang PK, Ponglux D, Watanabe K. Opioid receptor agonistic characteristics of mitragynine pseudoindoxyl in comparison with mitragynine derived from Thai medicinal plant Mitragyna speciosa. General Pharmacology. 33: 73-81. PMID 10428019 DOI: 10.1016/S0306-3623(98)00265-1 |
0.501 |
|
| 1999 |
TAKAYAMA H, KITAJIMA M, AIMI N. Chemistry of Camptothecin and its Related Alkaloids. Journal of Synthetic Organic Chemistry, Japan. 57: 181-193. DOI: 10.5059/Yukigoseikyokaishi.57.181 |
0.507 |
|
| 1999 |
Takayama H, Kuwajima T, Kitajima M, Nonato MG, Aimi N. First Total Synthesis of the Pandanus Alkaloids, Pandamarilactam-3Y and -3X Heterocycles. 50: 75-78. DOI: 10.3987/Com-98-S(H)54 |
0.488 |
|
| 1999 |
OHMORI O, TAKAYAMA H, KITAJIMA M, AIMI N. First Synthesis of Neoalangiside, a New Tetrahydroisoquinoline-monoterpene Glucoside with Oxygen Functions at Unusual C1, C2 Positions. Chemical & Pharmaceutical Bulletin. 47: 1512-1513. DOI: 10.1248/Cpb.47.1512 |
0.527 |
|
| 1999 |
Ohmori O, Takayama H, Aimi N. First synthesis of hunterioside, a novel disaccharide carrying monoterpenoid indole alkaloid, by assembly of three components, tryptamine, secologanin, and a newly-developed glucosyl donor Tetrahedron Letters. 40: 5039-5042. DOI: 10.1016/S0040-4039(99)00928-4 |
0.568 |
|
| 1999 |
Takayama H, Shimizu T, Sada H, Harada Y, Kitajima M, Aimi N. Stereochemical studies on the Uncaria alkaloid, 3-oxo-7-hydroxy-3,7- secorhynchophylline: The absolute configuration of 3-hydroxyoxindole derivatives Tetrahedron. 55: 6841-6846. DOI: 10.1016/S0040-4020(99)00337-3 |
0.547 |
|
| 1998 |
Takayama H, Watanabe A, Hosokawa M, Chiba K, Satoh T, Aimi N. Synthesis of a new class of camptothecin derivatives, the long-chain fatty acid esters of 10-hydroxycamptothecin, as a potent prodrug candidate, and their in vitro metabolic conversion by carboxylesterases. Bioorganic & Medicinal Chemistry Letters. 8: 415-8. PMID 9871589 DOI: 10.1016/S0960-894X(98)00039-0 |
0.52 |
|
| 1998 |
Leewanich P, Tohda M, Matsumoto K, Subhadhirasakul S, Takayama H, Aimi N, Watanabe H. Inhibitory effects of corymine-related compounds on glycine receptors expressed in Xenopus oocytes. Japanese Journal of Pharmacology. 77: 169-72. PMID 9681574 DOI: 10.1254/Jjp.77.169 |
0.527 |
|
| 1998 |
Leewanich P, Tohda M, Matsumoto K, Subhadhirasakul S, Takayama H, Aimi N, Watanabe H. A possible mechanism underlying corymine inhibition of glycine-induced Cl- current in Xenopus oocytes. European Journal of Pharmacology. 348: 271-7. PMID 9652343 DOI: 10.1016/S0014-2999(98)00147-2 |
0.483 |
|
| 1998 |
Thongpradichote S, Matsumoto K, Tohda M, Takayama H, Aimi N, Sakai S, Watanabe H. Identification of opioid receptor subtypes in antinociceptive actions of supraspinally-administered mitragynine in mice. Life Sciences. 62: 1371-8. PMID 9585164 DOI: 10.1016/S0024-3205(98)00075-7 |
0.487 |
|
| 1998 |
Takayama H, Ohmori O, Sakai M, Funahashi M, Kitajima M, Santiarworn D, Liawruangrath B, Aimi N. Isolation, Partial Synthesis and Stereochemical Study of 10-Hydroxystrictosamide, a Constituent of Nauclea orientalis in Thailand Heterocycles. 49: 49. DOI: 10.3987/Com-98-S12 |
0.577 |
|
| 1998 |
Aimi N, Takayama H, Subhadhirasakul S, Ohmori O, Kitajima M, Ponglux D. Hunterioside B, a Disaccharide Carrying Monoterpenoid Indole Alkaloid, from Hunteria zeylanica Heterocycles. 47: 87. DOI: 10.3987/Com-97-S(N)28 |
0.504 |
|
| 1998 |
Takayama H, Sakai S. Chapter 11 Monoterpenoid Indole Alkaloid Syntheses Utilizing Biomimetic Reactions The Alkaloids: Chemistry and Biology. 50: 415-452. DOI: 10.1016/S1099-4831(08)60049-8 |
0.362 |
|
| 1998 |
Abdel-Moty SG, Sakai S, Aimi N, Takayama H, Kitajima M, El-Shorbagi A, Ahmed AN, Omar NM. Synthesis of cytotoxic 1-polyhydroxyalkyl-β-carboline derivatives European Journal of Medicinal Chemistry. 32: 1009-1017. DOI: 10.1016/S0223-5234(97)89645-6 |
0.546 |
|
| 1998 |
Ohmori O, Kumazawa K, Hoshino H, Suzuki T, Morishima Y, Kohno H, Kitajima M, Sakai S, Takayama H, Aimi N. Final solution on the long-standing structural arguments on the C-3 stereochemistries of three glucoindole alkaloids: Palicoside, dolichantoside, and isodolichantoside — through chemical conversions and spectroscopic studies Tetrahedron Letters. 39: 7737-7740. DOI: 10.1016/S0040-4039(98)01686-4 |
0.531 |
|
| 1998 |
Takayama H, Kurihara M, Kitajima M, Said IM, Aimi N. New indole alkaloids from the leaves of malaysian: Mitragyna speciosa Tetrahedron. 54: 8433-8440. DOI: 10.1016/S0040-4020(98)00464-5 |
0.6 |
|
| 1998 |
Kitajima M, Fischer U, Nakamura M, Ohsawa M, Ueno M, Takayama H, Unger M, Stöckigt J, Aimi N. Anthraquinones from Ophiorrhiza pumila tissue and cell cultures Phytochemistry. 48: 107-111. DOI: 10.1016/S0031-9422(97)00614-6 |
0.512 |
|
| 1997 |
Leewanich P, Tohda M, Matsumoto K, Subhadhirasakul S, Takayama H, Aimi N, Watanabe H. Inhibitory effects of corymine, an alkaloidal component from the leaves of Hunteria zeylanica, on glycine receptors expressed in Xenopus oocytes. European Journal of Pharmacology. 332: 321-6. PMID 9300267 DOI: 10.1016/S0014-2999(97)01097-2 |
0.474 |
|
| 1997 |
Matsumoto K, Mizowaki M, Takayama H, Sakai S, Aimi N, Watanabe H. Suppressive effect of mitragynine on the 5-methoxy-N,N-dimethyltryptamine-induced head-twitch response in mice. Pharmacology, Biochemistry, and Behavior. 57: 319-23. PMID 9164589 DOI: 10.1016/S0091-3057(96)00314-0 |
0.484 |
|
| 1997 |
Fujiwara M, Ijichi K, Hanasaki Y, Ide T, Katsuura K, Takayama H, Aimi N, Shigeta S, Konno K, Yokota T, Baba M. Thiadiazole derivatives: highly potent and selective inhibitors of human immunodeficiency virus type 1 (HIV-1) replications in vitro. Microbiology and Immunology. 41: 301-8. PMID 9159403 DOI: 10.1111/J.1348-0421.1997.Tb01205.X |
0.493 |
|
| 1997 |
Tohda M, Thongpraditchote S, Matsumoto K, Murakami Y, Sakai S, Aimi N, Takayama H, Tongroach P, Watanabe H. Effects of mitragynine on cAMP formation mediated by delta-opiate receptors in NG108-15 cells. Biological & Pharmaceutical Bulletin. 20: 338-40. PMID 9145205 DOI: 10.1248/Bpb.20.338 |
0.498 |
|
| 1997 |
KOSHIISHI I, TAKAYAMA H, AIMI N, YAMAGUCHI K, TOYODA H, IMANARI T. A Novel Reaction of Cyanate with Dehydroascorbate. Chemical & Pharmaceutical Bulletin. 45: 344-348. DOI: 10.1248/Cpb.45.344 |
0.526 |
|
| 1997 |
Aimi N, Shimizu T, Sada H, Takayama H, Sakai S, Wongseripipatana S, Ponglux D. Structures of Us-7 and Us-8: a new type of oxindole alkaloids isolated fromUncaria attenuata Korth Journal of the Chemical Society-Perkin Transactions 1. 187-188. DOI: 10.1039/A607017E |
0.585 |
|
| 1997 |
Hamzah AS, Jasmani H, Ahmad R, Baba AR, Lajis NH, Aimi N, Kitajima M, Takayama H. New anthraquinones from the roots of Hedyotis dichotoma Journal of Natural Products. 60: 36-37. DOI: 10.1021/Np960583J |
0.581 |
|
| 1997 |
Takayama H, Iimura Y, Kitajima M, Aimi N, Konno K, Inoue H, Fujiwara M, Mizuta T, Yokota T, Shigeta S, Tokuhisa K, Hanasaki Y, Katsuura K. Discovery of anti-influenza A virus activity of a corynanthe-type indole alkaloid, hirsutine, in vitro and the structure-activity relationship of natural and synthetic analogs Bioorganic and Medicinal Chemistry Letters. 7: 3145-3148. DOI: 10.1016/S0960-894X(97)10154-8 |
0.534 |
|
| 1997 |
Konno K, Inoue H, Fujiwara M, Mizuta T, Takayama H, Iimura Y, Aimi N, Tokuhisa K, Hanasaki Y, Katsuura K, Shigeta S, Yokota T. Inhibitory effect of hirsutine on influenza virus replication in vitro Antiviral Research. 34: A88. DOI: 10.1016/S0166-3542(97)83306-2 |
0.456 |
|
| 1997 |
Kitajima M, Nakamura M, Takayama H, Saito K, Stöckigt J, Aimi N. Constituents of regenerated plants of Ophiorrhiza pumila; formation of a new glycocamptothecin and predominant formation of (3R)-deoxypumiloside over (3S)-congener Tetrahedron Letters. 38: 8997-9000. DOI: 10.1016/S0040-4039(97)10404-X |
0.34 |
|
| 1997 |
Takayama H, Watanabe F, Kitajima M, Aimi N. A radical cyclization strategy for the concise total synthesis of (±)-geissoschizine Tetrahedron Letters. 38: 5307-5310. DOI: 10.1016/S0040-4039(97)01186-6 |
0.498 |
|
| 1997 |
Kitajima M, Masumoto S, Takayama H, Aimi N. Isolation and Partial synthesis of 3(R)- and 3(S)-deoxypumiloside; structural revision of the key metabolite from the camptothecin producing plant, Ophiorrhiza pumila Tetrahedron Letters. 38: 4255-4258. DOI: 10.1016/S0040-4039(97)00858-7 |
0.505 |
|
| 1997 |
Ismail NH, Ali AM, Aimi N, Kitajima M, Takayama H, Lajis NH. Anthraquinones from Morinda elliptica Phytochemistry. 45: 1723-1725. DOI: 10.1016/S0031-9422(97)00252-5 |
0.431 |
|
| 1996 |
Matsumoto K, Mizowaki M, Suchitra T, Murakami Y, Takayama H, Sakai S, Aimi N, Watanabe H. Central antinociceptive effects of mitragynine in mice: contribution of descending noradrenergic and serotonergic systems. European Journal of Pharmacology. 317: 75-81. PMID 8982722 DOI: 10.1016/S0014-2999(96)00714-5 |
0.487 |
|
| 1996 |
Leewanich P, Tohda M, Matsumoto K, Subhadhirasakul S, Takayama H, Aimi N, Watanabe H. Behavioral studies on alkaloids extracted from the leaves of Hunteria zeylanica. Biological & Pharmaceutical Bulletin. 19: 394-9. PMID 8924908 DOI: 10.1248/Bpb.19.394 |
0.482 |
|
| 1996 |
Matsumoto K, Mizowaki M, Suchitra T, Takayama H, Sakai S, Aimi N, Watanabe H. Antinociceptive action of mitragynine in mice: evidence for the involvement of supraspinal opioid receptors. Life Sciences. 59: 1149-55. PMID 8831802 DOI: 10.1016/0024-3205(96)00432-8 |
0.493 |
|
| 1996 |
Ijichi K, Fujiwara M, Nagano H, Matsumoto Y, Hanasaki Y, Ide T, Katsuura K, Takayama H, Shirakawa S, Aimi N, Shigeta S, Konno K, Matsushima M, Yokota T, Baba M. Anti-HIV-1 activity of thiadiazole derivatives: structure-activity relationship, reverse transcriptase inhibition, and lipophilicity. Antiviral Research. 31: 87-94. PMID 8793012 DOI: 10.1016/0166-3542(96)00950-3 |
0.495 |
|
| 1996 |
Takayama H, Kurihara M, Subhadhirasakul S, Kitajima M, Aimi N, Sakai S. Stereochemical Assignment of Pseudoindoxyl Alkaloids Heterocycles. 42: 87. DOI: 10.3987/Com-95-S27 |
0.352 |
|
| 1996 |
KITAJIMA M, SHIRAKAWA S, ABDEL-MOTY SGA, TAKAYAMA H, SAKAI S, AIMI N, STOCKIGT J. Structure and Synthesis of a New Chiral .BETA.-Carboline Found in Cultured Cell Clumps of Rauwolfia serpentina and Rhazya stricta. Chemical & Pharmaceutical Bulletin. 44: 2195-2197. DOI: 10.1248/Cpb.44.2195 |
0.586 |
|
| 1996 |
TAKAYAMA H, MIYABE Y, SHITO T, KITAJIMA M, AIMI N. Biomimetic Synthesis of Nauclea Indole Alkaloids, Naucleidinal, and 3-epi-Naucleidinal, by Stereoselective Rearrangement of Strictsamide and the Vincoside Lactam Aglycones. Chemical & Pharmaceutical Bulletin. 44: 2192-2194. DOI: 10.1248/cpb.44.2192 |
0.508 |
|
| 1996 |
AIMI N, KITAJIMA M, OYA N, NITTA W, TAKAYAMA H, SAKAI S, KOSTENYUK I, GLEBA Y, ENDREB S, STOCKIGT J. Isolation of Alkaloids from Cultured Hybrid Cells of Rauwolfia serpentina*Rhazya stricta. Chemical & Pharmaceutical Bulletin. 44: 1637-1639. DOI: 10.1248/Cpb.44.1637 |
0.3 |
|
| 1996 |
Takayama H, Shirakawa S, Kitajima M, Aimi N, Yamaguchi K, Hanasaki Y, Ide T, Katsuura K, Fujiwara M, Ijichi K, Konno K, Sigeta S, Yokota T, Baba M. Utilization of Wieland furoxan synthesis for preparation of 4-aryl-1,2,5-oxadiazole-3-yl carbamate derivatives having potent anti-HIV activity Bioorganic and Medicinal Chemistry Letters. 6: 1993-1996. DOI: 10.1016/0960-894X(96)00355-1 |
0.516 |
|
| 1996 |
Nagano H, Ijichi K, Fujiwara M, Matsumoto Y, Konno K, Yokota T, Matsushima M, Hanasaki Y, Katsuura K, Takayama H, Aimi N, Baba M, Shigeta S. Structure - activity relationship of non-nucleoside RT inhibitor, thiadizaole derivatives Antiviral Research. 30: A30. DOI: 10.1016/0166-3542(96)80265-8 |
0.51 |
|
| 1995 |
Subhadhirasakul S, Takayama H, Miyabe Y, Kitajima M, Ponglux D, Sakai S, Aimi N. Two novel sarpagine-type indole alkaloids from the leaves of Hunteria zeylanica in Thailand Heterocycles. 41: 2049-2056. DOI: 10.3987/Com-95-7170 |
0.541 |
|
| 1995 |
Takayama H, Morikawa M, Kitajima M, Sakai Si, Aimi N. Synthesis and conformational analysis of a new Indole Alkaloid, 2,7-Dihydroxyapogeissoschizine Natural Product Letters. 7: 81-84. DOI: 10.1080/10575639508043193 |
0.552 |
|
| 1995 |
Takayama H, Sakai S. Recent advances in the chemistry of Gelsemium alkaloids Studies in Natural Products Chemistry. 15: 465-518. DOI: 10.1016/S1572-5995(06)80141-9 |
0.384 |
|
| 1995 |
Takayama H, Maeda M, Ohbayashi S, Kitajima M, Sakai Si, Aimi N. The first total synthesis of (-)-mitragynine, an analgesic indole alkaloid in mitragyna speciosa Tetrahedron Letters. 36: 9337-9340. DOI: 10.1016/0040-4039(95)02022-H |
0.543 |
|
| 1995 |
TAKAYAMA H, YAMAMOTO R, KURIHARA M, KITAJIMA M, AIMI N, MAO L, SAKAI S. ChemInform Abstract: On the Indole Alkaloid, Nauclefidine; Structure Revision, Synthesis, and a Biomimetic Transformation from the Vincoside Lactam. Cheminform. 26: no-no. DOI: 10.1002/chin.199516272 |
0.505 |
|
| 1994 |
Ponglux D, Wongseripipatana S, Takayama H, Kikuchi M, Kurihara M, Kitajima M, Aimi N, Sakai S. A New Indole Alkaloid, 7 alpha-Hydroxy-7H-mitragynine, from Mitragyna speciosa in Thailand. Planta Medica. 60: 580-1. PMID 17236085 DOI: 10.1055/S-2006-959578 |
0.506 |
|
| 1994 |
Subhadhirasakul S, Aimi N, Takayama H, Ponglux D, Sakai S. Hunterioside, first biose bound monoterpenoid indole alkaloid from Hunteria zeylanica. Chemical & Pharmaceutical Bulletin. 42: 991-3. PMID 8020135 DOI: 10.1248/Cpb.42.991 |
0.555 |
|
| 1994 |
Sakai S, Takayama H. Biomimetic chemical transformation from simple indole alkaloids to Gelsemium alkaloids Pure and Applied Chemistry. 66: 2139-2142. DOI: 10.1351/Pac199466102139 |
0.434 |
|
| 1994 |
TAKAYAMA H, SUDA S, CHEN I, KITAJIMA M, AIMI N, SAKAI S. Two New Dimeric Indole Alkaloids from Tabernaemontana subglobosa MERR. from Taiwan. Chemical & Pharmaceutical Bulletin. 42: 280-284. DOI: 10.1248/cpb.42.280 |
0.515 |
|
| 1994 |
SUBHADHIRASAKUL S, TAKAYAMA H, MIYABE Y, AIMI N, PONGLUX D, SAKAI S. New Corymine-Related Indole Alkaloids from Hunteria zeylanica in Thailand. Chemical & Pharmaceutical Bulletin. 42: 2645-2646. DOI: 10.1248/Cpb.42.2645 |
0.574 |
|
| 1994 |
TAKAYAMA H, SUBHADHIRASAKUL S, MIZUKI J, KITAJIMA M, AIMI N, PONGLUX D, SAKAI S. A New Class of Two Dimeric Indole Alkaloids, Coryzeylamine and Deformylcoryzeylamine, from the Leaves of Hunteria zeylanica in Thailand. Chemical & Pharmaceutical Bulletin. 42: 1957-1959. DOI: 10.1248/Cpb.42.1957 |
0.393 |
|
| 1994 |
SUBHADHIRASAKUL S, TAKAYAMA H, AIMI N, PONGLUX D, SAKAI S. Novel Indole Alkaloids from the Leaves of Rauwolfia sumatrana JACK. in Thailand. Chemical & Pharmaceutical Bulletin. 42: 1427-1431. DOI: 10.1248/Cpb.42.1427 |
0.57 |
|
| 1994 |
Takayama H, Wongseripipatana S, Morohoshi Y, Ponglux D, Kitajima M, Aimi N, Sakai Si. Two New Iridoros From The Leaves Of Gelsemium Elegans Benth. In Thailand Natural Product Letters. 5: 15-20. DOI: 10.1080/10575639408043929 |
0.599 |
|
| 1994 |
Kitajima M, Takayama H, Sakai S. Synthesis of a novel gelsedine-type gelsemium alkaloid, gelsemicine Journal of the Chemical Society-Perkin Transactions 1. 1573-1578. DOI: 10.1039/P19940001573 |
0.361 |
|
| 1994 |
Takayama H, Nitta W, Kitajima M, Aimi N, Sakai S. A New Gardneria Alkaloid, Gardquinolone, Having a Novel 4-Quinolone Skeleton Journal of Natural Products. 57: 521-523. DOI: 10.1021/Np50106A014 |
0.615 |
|
| 1994 |
Takayama H, Tominaga Y, Kitajima M, Aimi N, Sakai S. First Synthesis of the Novel Gelsemium Alkaloids, Gelselegine, Gelsenicine, and Gelsedine Using a Biomimetic Approach The Journal of Organic Chemistry. 59: 4381-4385. DOI: 10.1021/Jo00095A010 |
0.566 |
|
| 1994 |
Takayama H, Yamamoto R, Kurihara M, Kitajima M, Aimi N, Mao L, Sakai Si. On the indole alkaloid, nauclefidine; structure revision, synthesis, and a biomimetic transformation from the vincoside lactam Tetrahedron Letters. 35: 8813-8816. DOI: 10.1016/S0040-4039(00)78505-4 |
0.497 |
|
| 1994 |
Takayama H, Kitajima M, Sakai S. A biomimetic synthesis of a new skeletal Gelsemium alkaloid, 11-methoxy-19(R)-hydroxygelselegine Tetrahedron. 50: 11813-11820. DOI: 10.1016/S0040-4020(01)89296-6 |
0.339 |
|
| 1994 |
Takayama H, Kitajima M, Sakai S. A biomimetic synthesis of a novel seco indole alkaloid, 11-methoxygelsemamide Tetrahedron. 50: 8363-8370. DOI: 10.1016/S0040-4020(01)85559-9 |
0.4 |
|
| 1994 |
Keawpradub N, Takayama H, Aimi N, Sakai SI. Indole alkaloids from Alstonia glaucescens Phytochemistry. 37: 1745-1749. DOI: 10.1016/S0031-9422(00)89603-X |
0.547 |
|
| 1993 |
SEKI H, TAKAYAMA H, AIMI N, SAKAI S, PONGLUX D. A Nuclear Magnetic Resonance Study on the Eleven Stereoisomers of Heteroyohimbine-Type Oxindole Alkaloids. Chemical & Pharmaceutical Bulletin. 41: 2077-2086. DOI: 10.1248/Cpb.41.2077 |
0.486 |
|
| 1993 |
Takayama H, Seki N, Kitajima M, Aimi N, Sakai SI. Application Of Tungstate-Catalyzed Oxidation To The Conversion of Oxindoles Into The Corresponding Na-Methoxyoxindoles In The Gelsemium AlkaloidSynthesis Natural Product Letters. 2: 271-276. DOI: 10.1080/10575639308043821 |
0.508 |
|
| 1993 |
Phisalaphong C, Takayama H, Sakai S. A First synthesis of 20-hydroxydihydrorankinidine, a new oxindole alkaloid from Gelsemium elegans benth. Tetrahedron Letters. 34: 4035-4038. DOI: 10.1016/S0040-4039(00)60609-3 |
0.387 |
|
| 1993 |
Endreß S, Takayama H, Suda S, Kitajima M, Aimi N, Sakai SI, Stöckigt J. Alkaloids from Rauwolfia serpentina cell cultures treated with ajmaline Phytochemistry. 32: 725-730. DOI: 10.1016/S0031-9422(00)95161-6 |
0.561 |
|
| 1992 |
Endreß S, Suda S, Takayama H, Aimi N, Sakai S, Stöckigt J. Isolation, Identification, and Chemical Synthesis of 6alpha-Hydroxyraumacline: A Novel Alkaloid from Cultivated Rauwolfia serpentina Cells. Planta Medica. 58: 410-2. PMID 17226497 DOI: 10.1055/S-2006-961502 |
0.558 |
|
| 1992 |
Takayama H, Katsura M, Seki N, Kitajima M, Aimi N, Sakai S, Santiarworn D, Liawruangrath B. Elaeocarpidine, a Naturally Occurring Racemate, from Tarenna vanprukii. Planta Medica. 58: 289-91. PMID 17226473 DOI: 10.1055/S-2006-961462 |
0.485 |
|
| 1992 |
TAKAYAMA H, HITOTSUYANAGI Y, YAMAGUCHI K, AIMI N, SAKAI S. On the Alkaloidal Constituents of Aconitum sanyoense NAKAI var. tonense NAKAI. Chemical & Pharmaceutical Bulletin. 40: 2927-2931. DOI: 10.1248/Cpb.40.2927 |
0.582 |
|
| 1992 |
Endreß S, Suda S, Takayama H, Kitajima M, Aimi N, Sakai S, Stöckigt J. Biotransformation of Ajmaline in Cell Suspension Cultures ofRauwolfia serpentina Planta Medica. 58: 618-618. DOI: 10.1055/S-2006-961617 |
0.461 |
|
| 1992 |
Takayama H, Kitajima M, Ogata K, Sakai S. The first and biomimetic construction of the new skeleton of gelselegine-type oxindole alkaloids The Journal of Organic Chemistry. 57: 4583-4584. DOI: 10.1021/Jo00043A011 |
0.343 |
|
| 1992 |
Takayama H, Koike T, Aimi N, Sakai S. A convenient method for converting saturated aldehydes to .alpha.,.beta.-unsaturated aldehydes elongated by one carbon atom. The palladium(II)-promoted oxidation of methyl enol ethers The Journal of Organic Chemistry. 57: 2173-2176. DOI: 10.1021/Jo00033A050 |
0.49 |
|
| 1992 |
Takayama H, Watanabe T, Seki H, Aimi N, Sakai Si. Geissoschizine revisited - definite proof of its stereostructure Tetrahedron Letters. 33: 6831-6834. DOI: 10.1016/S0040-4039(00)61787-2 |
0.508 |
|
| 1992 |
Takayama H, Kitajima M, Suda S, Aimi N, Sakai Si, Endreß S, Stöckigt J. Structure and Synthesis of a New Indole Alkaloid, 19 (S)-Hydroxy-Nb-methylraumacline, Obtained by the Biotransformation of Ajmaline in Plant Cell Cultures of Rauwolfia Serpentina Benth Tetrahedron. 48: 2627-2634. DOI: 10.1016/S0040-4020(01)88525-2 |
0.597 |
|
| 1991 |
KOIKE T, TAKAYAMA H, SAKAI S. Synthetic Studies on the Picraline-Type Indole Alkaloids-I: Improved Synthesis of C-Mavacurine-Type Compounds and a New Skeletal Rearrangement in a Corynanthe-Type Derivative. Chemical & Pharmaceutical Bulletin. 39: 1677-1681. DOI: 10.1248/Cpb.39.1677 |
0.36 |
|
| 1991 |
Aimi N, Uchida N, Ohya N, Hosokawa H, Takayama H, Sakai Si, Mendonza LA, Polz L, Stöckigt J. Novel indole alkaloids from cell suspension cultures of aspidosperma quebracho blanco schlecht Tetrahedron Letters. 32: 4949-4952. DOI: 10.1016/S0040-4039(00)93504-4 |
0.572 |
|
| 1991 |
Takayama H, Phisalaphong C, Kitajima M, Aimi N, Sakai Si. An efficient synthetic pathway to the macroline-type indole alkaloids, talcarpine and alstonerine from ajmaline Tetrahedron. 47: 1383-1392. DOI: 10.1016/S0040-4020(01)86414-0 |
0.547 |
|
| 1990 |
Takayama H, Yokota M, Aimi N, Sakai S, Lu S, Chen I. Two New Diterpene Alkaloids, 10-Hydroxyneoline and 14-O-Acetyl-10-hydroxyneoline, from Aconitum fukutomei Journal of Natural Products. 53: 936-939. DOI: 10.1021/Np50070A023 |
0.508 |
|
| 1990 |
Takayama H, Odaka H, Aimi N, Sakai S. Synthetic studies on gelsedine alkaloids-II: first construction of gelsedine skeleton (Na-desmethoxygelsemicine) from gardnerine based on the alternative biogenetic speculation. Tetrahedron Letters. 31: 5483-5486. DOI: 10.1016/S0040-4039(00)97878-X |
0.551 |
|
| 1990 |
Polz L, Stöckigt J, Takayama H, Uchida N, Aimi N, Sakai S. Biotransformation of ajmaline in plant cell cultures of rauwolfia serpentina benth.: The new indole alkaloids raumacline and N(b)-methylraumacline. Tetrahedron Letters. 31: 6693-6696. DOI: 10.1016/S0040-4039(00)97149-1 |
0.577 |
|
| 1990 |
Takayama H, Horigome M, Aimi N, Sakai S. Synthetic studies on gelsedine alkaloids-i: Stereoselective preparation of hypothetical biogenetic intermediates, D-norsarpagine type compounds from ajmaline. Tetrahedron Letters. 31: 1287-1290. DOI: 10.1016/S0040-4039(00)88787-0 |
0.541 |
|
| 1989 |
TAKAYAMA H, HITOTSUYANAGI Y, YAMAGUCHI K, AIMI N, SAKAI S. Two new diterpene alkaloids, 10-hydroxyisotalatizidine and 10-hydroxy-talatizamine. Chemical & Pharmaceutical Bulletin. 37: 548-550. DOI: 10.1248/Cpb.37.548 |
0.583 |
|
| 1989 |
Takayama H, Sun J, Aimi N, Sakai S, Lu S, Chen I. Lassiocarpine, a novel C20-diterpene alkaloid isolated from aconitum kojimae ohwi Tetrahedron Letters. 30: 3441-3442. DOI: 10.1016/S0040-4039(00)99266-9 |
0.586 |
|
| 1989 |
Takayama H, Masubuchi K, Kitajima M, Aimi N, Sakai S. A biomimetic construction of humantenine skeleton Tetrahedron. 45: 1327-1336. DOI: 10.1016/0040-4020(89)80131-0 |
0.502 |
|
| 1989 |
TAKAYAMA H, MASUBUCHI K, KITAJIMA M, AIMI N, SAKAI S. ChemInform Abstract: A Biomimetic Construction of the Humantenine Skeleton. Cheminform. 20. DOI: 10.1002/chin.198927314 |
0.418 |
|
| 1988 |
Takayama H, Okazaki T, Yamaguchi K, Aimi N, Haginiwa J, Sakai S. Structure of two new diterpene alkaloids, 3-epi-ignavinol and 2,3-dehydrodelcosine. Chemical & Pharmaceutical Bulletin. 36: 3210-3212. DOI: 10.1248/Cpb.36.3210 |
0.589 |
|
| 1988 |
Ponglux D, Wongseripipatana S, Takayama H, Ogata K, Aimi N, Sakai S. A new class of indole alkaloid ‘elegansamine’ constructed from a monoterpenoid indole alkaloid and an iridoid Tetrahedron Letters. 29: 5395-5396. DOI: 10.1016/S0040-4039(00)82877-4 |
0.556 |
|
| 1988 |
Ponglux D, Wongseripipatana S, Subhadhirasakul S, Takayama H, Yokota M, Ogata K, Phisalaphong C, Aimi N, Sakai S. Studies on the indole alkaloids of gelsem1um elegans (thailand): structure elucidation and proposal of biogenetic route Tetrahedron. 44: 5075-5094. DOI: 10.1016/S0040-4020(01)86012-9 |
0.575 |
|
| 1987 |
Sakai S, Wongseripipatana S, Ponglux D, Yokota M, Ogata K, Takayama H, Aimi N. Indole alkaloids isolated from Gelsemium elegans (Thailand): 19-(Z)-akuammidine, 16-epi-voacarpine, 19-hydroxydihydrogelsevirine, and the revised structure of koumidine. Chemical & Pharmaceutical Bulletin. 35: 4668-4671. DOI: 10.1248/Cpb.35.4668 |
0.572 |
|
| 1987 |
Sakai S, Okazaki T, Yamaguchi K, Takayama H, Aimi N. Structures of torokonine and gomandonine, two new diterpene alkaloids from Aconitum subcuneatum Nakai. Chemical & Pharmaceutical Bulletin. 35: 2615-2617. DOI: 10.1248/Cpb.35.2615 |
0.593 |
|
| 1987 |
Takayama H, Yamaguchi K, Okazaki T, Aimi N, Sakai S. Chemical conversion of lycotonine into an aconitine alkaloid, 7-deoxylycoctonine Journal of the Chemical Society, Chemical Communications. 818-820. DOI: 10.1039/C39870000818 |
0.523 |
|
| 1986 |
Takayama H, Hayashi K, Koizumi T. Enantioselective total synthesis of Glyoxalase I inhibitor using asymmetric Diels-Alder reaction of a new chiral dienophile, ()S-3-(3-triflouromethylpyrid-2-ylsulfinyl)acrylate. Tetrahedron Letters. 27: 5509-5512. DOI: 10.1016/S0040-4039(00)85252-1 |
0.312 |
|
| 1986 |
Takayama H, Iyobe A, Koizumi T. The First Efficient Asymmetric Synthesis of 7-Oxabicyclo[2.2.1]hept-5-ene-2-carboxylate Derivatives. Cheminform. 17. DOI: 10.1002/Chin.198644064 |
0.303 |
|
| 1984 |
SAKAI S, TAKAYAMA H, YAMAGUCHI K, IDE N, OKAMOTO T. Partial Synthesis of Isodelphinine and Penduline Yakugaku Zasshi. 104: 731-752. DOI: 10.1248/Yakushi1947.104.7_731 |
0.305 |
|
| 1982 |
TAKAYAMA H, HASEGAWA S, SAKAI S, HAGINIWA J, OKAMOTO T. On the Alkaloids of Aconitum japonicum THUNB. collected at Mt. Mineoka (Chiba Pref.) : Structure Elucidation and Partial Synthesis of a New Alkaloid, 15-α-Hydroxyneoline Yakugaku Zasshi. 102: 525-532. DOI: 10.1248/Yakushi1947.102.6_525 |
0.354 |
|
| 1982 |
TAKAYAMA H, TOKITA AN, ITO M, SAKAI S, KUROSAKI F, OKAMOTO T. On the Alkaloids of Aconitum yesoense NAKAI Yakugaku Zasshi. 102: 245-257. DOI: 10.1248/Yakushi1947.102.3_245 |
0.413 |
|
| 1982 |
Sakai S, Yamamoto I, Yamaguchi K, Takayama H, Ito M, Okamoto T. The structure of the new diterpene alkaloid nominine and the absolute configuration of kobusine. Chemical & Pharmaceutical Bulletin. 30: 4579-4582. DOI: 10.1248/Cpb.30.4579 |
0.388 |
|
| 1981 |
Sakai S, Takayama H, Ito M, Koga M, Sasaki S, Okamoto T. Structure of Ezochasmanine, Ezochasmaconitine, Anisoezochasmaconitine and Synthesis of Vilmorrianine A Heterocycles. 15: 403. DOI: 10.3987/S-1981-01-0403 |
0.338 |
|
| 1981 |
TAKAYAMA H, HASEGAWA S, SAKAI S, HAGINIWA J, OKAMOTO T. Structure elucidation of a new aconite alkaloid, 15-.ALPHA.-hydroxyneoline. Chemical & Pharmaceutical Bulletin. 29: 3078-3080. DOI: 10.1248/Cpb.29.3078 |
0.391 |
|
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