Zobrazeno 1 - 10
of 226
pro vyhledávání: '"Kanki Komiyama"'
Publikováno v:
Biological and Pharmaceutical Bulletin. 36:1363-1369
Erythraline, isolated from the bark of Erythrina crista-galli which are used as Brazilian medicine plant for the treatment of inflammation diseases, suppressed nitric oxide (NO) production and induction of inducible nitric oxide synthase (iNOS) expre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26f9942fd4e703d478402119d0871c22
https://doi.org/10.1248/bpb.b12-00910
https://doi.org/10.1248/bpb.b12-00910
Publikováno v:
Phytochemistry. 72:2212-2218
A total of 20 alkaloids were isolated from the leaf and stem-bark extracts of Alstonia angustiloba, of which two are hitherto unknown. One is an alkaloid of the angustilobine type (angustilobine C), while the other is a bisindole alkaloid angustiphyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27ec8e314c9d585c2ca6979e5a4d770d
https://doi.org/10.1016/j.phytochem.2011.08.001
https://doi.org/10.1016/j.phytochem.2011.08.001
Publikováno v:
Tetrahedron. 67:3830-3838
The bark extract of the Malayan Alstonia angustifolia Wall provided the spirocyclic alkaloids macrodasines AeG. The structures of the new compounds were established by analysis of the spectroscopic data and in the case of macrodasines A and B confirm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8930077f4b73d5765fd13dd11754bb0b
https://doi.org/10.1016/j.tet.2011.03.099
https://doi.org/10.1016/j.tet.2011.03.099
Publikováno v:
Tetrahedron. 66:7799-7806
Three unusual natural products, viz., alstopirocine, a macroline alkaloid incorporating a substituted pyrrole moiety, pleiomaltinine, an alkaloidepyrone adduct, and pleiomalicine, an alkaloidecarbamic acid adduct, were isolated from the Malayan Alsto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a524f330448b1ce1f98ad478a6beeb69
https://doi.org/10.1016/j.tet.2010.07.079
https://doi.org/10.1016/j.tet.2010.07.079
Publikováno v:
Journal of Natural Products. 73:1107-1111
Four new bisindole alkaloids of the Strychnos-Strychnos type, leucoridines A-D (1-4), were isolated from the stem-bark extract of Leuconotis griffithii. Alkaloids 1-4 showed moderate cytotoxicity against drug-sensitive and vincristine-resistant human
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89333026e6b88c88c0c5ae08bcdff444
https://doi.org/10.1021/np1001187
https://doi.org/10.1021/np1001187
Autor:
Tadahiro Etoh, Masahiko Hayashi, Yeun-Mun Choo, Yun-Yee Low, Huey-Shen Pang, Toh-Seok Kam, Kanki Komiyama, Kuan-Hon Lim
Publikováno v:
Tetrahedron Letters. 51:269-272
Two new pentacyclic indole alkaloids, lirofolines A and B, possessing a novel rearranged ibogan ring system, are obtained from two Malayan Tabernaemontana species ( Tabernaemontana corymbosa and Tabernaemontana divaricata) and the structures are esta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8e3a9f86dae1bb0bc5e97f372f2182f
https://doi.org/10.1016/j.tetlet.2009.10.122
https://doi.org/10.1016/j.tetlet.2009.10.122
Autor:
Shunsuke Kawamata, Masaaki Ozawa, Akio Kishida, Chiaki Kuroda, Kanki Komiyama, Tadahiro Etoh, Masahiko Hayashi, Ayumi Ohsaki
Publikováno v:
Chemical and Pharmaceutical Bulletin. 58:1119-1122
Two new Erythrinan alkaloids, cristanines A and B (1, 2), were isolated from the bark of Erythrina crista-galli L. together with nine known Erythrinan alkaloids (3-5, 7-12) and an indole alkaloid (13). The structures of the compounds, cristanines A (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fc6d037277b22db6062a15b32cc1c3a
https://doi.org/10.1248/cpb.58.1119
https://doi.org/10.1248/cpb.58.1119
Publikováno v:
Journal of Natural Products. 72:2098-2103
Seven new indole alkaloids of the Strychnos type, leuconicines A-G (1-7), and a new eburnan alkaloid, (-)-eburnamaline (8), were isolated from the stem-bark extract of two Malayan Leuconotis species. The structures of these alkaloids were established
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9bdb3ad91cbd90c32ec44f7400fa111
https://doi.org/10.1021/np900576b
https://doi.org/10.1021/np900576b
Publikováno v:
Tetrahedron. 64:1397-1408
A total of 16 alkaloids, exemplified by mersinine A and its congeners, and constituting a new subclass of the monoterpenoid indoles, were isolated exclusively and for the first time from Kopsia singapurensis. The structures of these alkaloids were es
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::330f5ab4b47775a6aab86662d7979130
https://doi.org/10.1016/j.tet.2007.11.047
https://doi.org/10.1016/j.tet.2007.11.047
Autor:
Kanki Komiyama, Hironori Umetsu, Shinji Funayama, Kazuo Ryoyama, Hideaki Yamaguchi, Masahiko Hayashi, Toshiro Noshita, Yumi Kidachi
Publikováno v:
Journal of Health Science. 54:654-660
Dried apple peels were extracted with n-hexane, chloroform, and methanol successively. The portion of the chloroform extract that showed the strongest cytotoxic activity was purified by silica gel chromatography to isolate ursolic acid (UA). The amou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb89b0e5a2db6ee23267626a8e794a9e
https://doi.org/10.1248/jhs.54.654
https://doi.org/10.1248/jhs.54.654