H
Hiroshi Nakai
Researcher at Kyoto University
Publications - 65
Citations - 1183
Hiroshi Nakai is an academic researcher from Kyoto University. The author has contributed to research in topics: Crystal structure & Absolute configuration. The author has an hindex of 20, co-authored 65 publications receiving 1116 citations.
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Isolation and structural elucidation of new cyclotetrapeptides, trapoxins A and B, having detransformation activities as antitumor agents.
Hiroshi Itazaki,Kazuo Nagashima,Kenji Sugita,Hiroshi Yoshida,Yoshimi Kawamura,Yukio Yasuda,Koichi Matsumoto,Kikuo Ishii,Nobuo Uotani,Hiroshi Nakai,Akihiro Terui,Shinya Yoshimatsu,Yuji Ikenishi,Yuzo Nakagawa +13 more
TL;DR: New cyclotetrapeptides, trapoxins A and B were isolated from the culture broth of Helicoma ambiens RF-1023 and exhibit detransformation activities against v-sis oncogene-transformed NIH3T3 cells (sis/NIH 3T3) as antitumor agents.
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Novel Antitumor Sesquiterpenoids in Achillea millefolium
Takehiko Tozyo,Yohko Yoshimura,Kensuke Sakurai,Naomi Uchida,Yukihiro Takeda,Hiroshi Nakai,Hiroshi Ishii +6 more
TL;DR: Three new antitumor sesquiterpenoids, achimillic acids A, B and C, were isolated as methyl esters from Achillea millefolium and their structures were determined spectroscopically.
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Potent cytotoxic metabolites from a Leptosphaeria species. Structure determination and conformational analysis
Chika Takahashi,Katsuhiko Minoura,Takeshi Yamada,Atsushi Numata,Katsuhiko Kushida,Tetsuro Shingu,Sanji Hagishita,Hiroshi Nakai,Tomohiro Sato,Hiroshi Harada +9 more
TL;DR: In this paper, a new cytotoxic epipolysulfanyldioxopiperazine dimers, leptosins K (4), K1 (5) and K2 (6), have been isolated from a strain of Leptosphaeria sp. originally isolated from the marine alga Sargassum tortile.
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Stachyflin and acetylstachyflin, novel anti-influenza A virus substances, produced by Stachybotrys sp. RF-7260. I. Isolation, structure elucidation and biological activities.
Kazuyuki Minagawa,Shuichi Kouzuki,Jun Yoshimoto,Yoshimi Kawamura,Hiroyoshi Tani,Tatsuo Iwata,Yoshihiro Terui,Hiroshi Nakai,Shigenori Yagi,Naohiko Hattori,Tamio Fujiwara,Toshiyuki Kamigauchi +11 more
TL;DR: Two novel compounds, stachyFlin and acetylstachyflin, have been isolated by solid-state fermentation of Stachybotrys sp.
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Terprenins, Novel Immunosuppressants Produced by Aspergillus candidus
Toshiyuki Kamigauchi,Ryuji Sakazaki,Kazuo Nagashima,Yoshimi Kawamura,Yukio Yasuda,Keisuke Matsushima,Hiroyoshi Tani,Yasuo Takahashi,Kikuo Ishii,Ryuji Suzuki,Kenzo Koizumi,Hiroshi Nakai,Yuji Ikenishi,Yoshihiro Terui +13 more
TL;DR: The fermentation, isolation, structure elucidation and biological properties of these terprenins found were evaluated with respect to proliferation of mouse spleen lymphocytes which had been stimulated with concanavalin A.