Keiichi Yamaguchi
Chiba University
38 Papers
384 Citations
Keiichi Yamaguchi is an academic researcher from Chiba University. The author has contributed to research in topics: Indole test & Diterpene. The author has an hindex of 12, co-authored 38 publications.
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Papers
Elucidation of the structure of olivoretin a and d (teleocidin b)
Shin-ichiro Sakai,Norio Aimi,Keiichi Yamaguchi,Yukio Hitotsuyanagi,Chitoshi Watanabe,Kazuteru Yokose,Yasumasa Koyama,Koichi Shudo,Akiko Itai +8 more
TL;DR: In this paper, the known metabolites, indole-3-aldehyde, cyclo-Leu-Val and phenyl acetamide were isolated from Streptoverticillium olivoreticuli together with pimprinin derivatives.
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Gardneria alkaloids. XII. Carbon magnetic resonance spectra of gardneria alkaloids. A study on the configuration of the side chain double bonds of indole alkaloids.
TL;DR: In this article, the C-NMR spectra of several Gardneria alkaloids and their derivatives were studied and the chemical shifts of C(15) and C(21) were found to be diagnostic for the configuration of the side chain double bonds between C(19) and c(20).
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Elucidation of the structures of olivoretin B and C.
Yukio Hitotsuyanagi,Keiichi Yamaguchi,Koreharu Ogata,Norio Aimi,Shin-ichiro Sakai,Yasumasa Koyama,Yasuyuki Endo,Koichi Shudo,Akiko Itai,Yoichi Iitaka +9 more
TL;DR: The structures of olivoretin B and C were established by X-ray analysis as III and IV respectively, which are concerned with the cyclohexene ring conformation.
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