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Featured researches published by Tatsuo Yamauchi.


Tetrahedron | 1965

Digitalis saponins—IV : Structure of F-gitonin☆

Toshio Kawasaki; Itsuo Nishioka; Tetsuya Komori; Tatsuo Yamauchi; Kazumoto Miyahara

Abstract F-gitonin, a saponin from the leaves of Digitalis purpurea L., is shown to be O-β-D-glucopyranosyl-(1→2 glc 1)-O-β-D-xylopyranosyl-(1→3glc 1)-O-β-D-glucopyranosyl-(1→4)-O-β-D-galactopyranosyl 25D, 5α-spirostane-2α,3β-diol (gitogenin β-lycotetraoside) (I) and the conjugation of lycotetraose with 3β-hydroxyl group of gitogenin is definitely proved.


Chemical & Pharmaceutical Bulletin | 1967

Tetrahydrocannabinolic Acid, a Genuine Substance of Tetrahydrocannabinol

Tatsuo Yamauchi; Yukihiro Shoyama; Hanichiro Aramaki; Tomoko Azuma; Itsuo Nishioka


Chemical & Pharmaceutical Bulletin | 1963

SAPONINS OF TIMO (ANEMARRHENAE RHIZOMA). II. STRUCTURE OF TIMOSAPONIN A-III.

Toshio Kawasaki; Tatsuo Yamauchi


Chemical & Pharmaceutical Bulletin | 1962

Structures of dioscin, gracillin, and kikuba-saponin. 2. (Saponins of Japanese Dioscoreaceae. XI.

Toshio Kawasaki; Tatsuo Yamauchi


Chemical & Pharmaceutical Bulletin | 1968

Cannabichromenic Acid, a Genuine Substance of Cannabichromene

Yukihiro Shoyama; Toshio Fujita; Tatsuo Yamauchi; Itsuo Nishioka


Pharmaceutical bulletin | 1956

Saponins of Japanese Dioscoreaceae. V. On the Structure of Dioscin. (1)

Takeo Tsukamoto; Toshio Kawasaki; Tatsuo Yamauchi


Chemical & Pharmaceutical Bulletin | 1962

Kikuba-saponin. 1. (Saponins of Japanese Dioscoreaceae. X.

Toshio Kawasaki; Tatsuo Yamauchi; Ryoko Yamauchi


Chemical & Pharmaceutical Bulletin | 1965

Digitalis Saponins. III. Enzymatic Hydrolysis of Leaf Saponins of Digitalis purpurea L.

Toshio Kawasaki; Itsuo Nishioka; Tatsuo Yamauchi; Kazumoto Miyahara; Miyoko Enbutsu


Chemical & Pharmaceutical Bulletin | 1968

Octa (Per)-, Hepta- and Mono-Acetates of Dioscin

Toshio Kawasaki; Tatsuo Yamauchi


Pharmaceutical bulletin | 1957

Isolation of delta 3,5-desoxytigogenin (25D-spirosta-3,5-diene) from some Dioscoreaceae plants.

Takeo Tsukamoto; Toshio Kawasaki; Tatsuo Yamauchi; Yasutaka Shimauchi

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Yukihiro Shoyama

Nagasaki International University

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