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Isao Kitagawa

Kyoto Pharmaceutical University

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Publication

Featured researches published by Isao Kitagawa.

Chemical & Pharmaceutical Bulletin | 1996

Bioactive saponins and glycosides. III. Horse chestnut. (1): The structures, inhibitory effects on ethanol absorption, and hypoglycemic activity of escins Ia, Ib, IIa, IIb, and IIIa from the seeds of Aesculus hippocastanum L.

Masayuki Yoshikawa; Toshiyuki Murakami; Hisashi Matsuda; Johji Yamahara; Nobutoshi Murakami; Isao Kitagawa

Chemical & Pharmaceutical Bulletin | 1994

Escins-Ia, Ib, IIa, IIb, and IIIa, Bioactive Triterpene Oligoglycosides from the Seeds of Aesculus hippocastanum L.: Their Inhibitory Effects on Ethanol Absorption and Hypoglycemic Activity on Glucose Tolerance Test.

Masayuki Yoshikawa; Emiko Harada; Toshiyuki Murakami; Hisashi Matsuda; Noriko Wariishi; Johji Yamahara; Nobutoshi Murakami; Isao Kitagawa

Chemical & Pharmaceutical Bulletin | 1998

Structures of new acylated oleanene-type triterpene oligoglycosides, theasaponins E1 and E2, from the seeds of tea plant, Camellia sinensis (L.) O. Kuntze.

Isao Kitagawa; Kazuyuki Hori; Tomohisa Motozawa; Toshiyuki Murakami; Masayuki Yoshikawa

Chemical & Pharmaceutical Bulletin | 1993

ABSOLUTE STEREOSTRUCTURES OF PAEONISUFFRONE AND PAEONISUFFRAL, TWO NEW LABILE MONOTERPENES, FROM CHINESE MOUTAN CORTEX

Masayuki Yoshikawa; Emiko Harada; Atsuhiro Kawaguchi; Johji Yamahara; Nobutoshi Murakami; Isao Kitagawa

Chemical & Pharmaceutical Bulletin | 1996

Chemical Studies on Crude Drug Processing IX. On the Constituents of Rehmanniae Radix. (3). Absolute Stereostructures of Rehmaionosides A, B, and C, and Rehmapicroside, Biologically Active Ionone Glucosides and a Monoterpene Glucoside Isolated from Chinese Rehmanniae Radix

Masayuki Yoshikawa; Youichi Fukuda; Toshio Taniyama; Isao Kitagawa

Chemical & Pharmaceutical Bulletin | 1993

Indonesian Medicinal Plants. VI. On the Chemical Constituents of the Bark of Picrasma javanica BL. (Simaroubaceae) from Flores Island. Absolute Stereostructures of Picrajavanins A and B

Masayuki Yoshikawa; Emiko Harada; Shunji Aoki; Johji Yamahara; Nobutoshi Murakami; Hirotaka Shibuya; Isao Kitagawa

Chemical & Pharmaceutical Bulletin | 1997

Indonesian Medicinal Plants. XIX. Chemical Structures of Four Additional Resin-Glycosides, Mammosides A, B, H1, and H2, from the Tuber of Merremia mammosa (Convolvulaceae).

Isao Kitagawa; Kazuyoshi Ohashi; Nam In Baek; Masahiro Sakagami; Masayuki Yoshikawa; Hirotaka Shibuya

Chemical & Pharmaceutical Bulletin | 1996

Indonesian Medicinal Plants. XV. Chemical Structures of Five New Resin-Glycosides, Merremosides a, b, c, d, and e, from the Tuber of Merremia mammosa (Convolvulaceae)

Isao Kitagawa; Nam In Baek; Keiko Kawashima; Yoshihiro Yokokawa; Masayuki Yoshikawa; Kazuyoshi Ohashi; Hirotaka Shibuya

Chemical & Pharmaceutical Bulletin | 1989

Synthesis of (11S)-(+)- and (11R)-(−)-jalapinolic acids. a revision of chemical structures of merremosides B and D

Hirotaka Shibuya; Keiko Kawashima; Nam-In Baek; Norihiko Narita; Masayuki Yoshikawa; Isao Kitagawa

Chemical & Pharmaceutical Bulletin | 1993

A NEW APPROACH TO THE SYNTHESIS OF OPTICALLY ACTIVE PSEUDO-SUGAR AND PSEUDO-NUCLEOSIDE -SYNTHESES OF PSEUDO-α-D-ARABINOFURANOSE, (+)-CYCLARADINE, AND (+)-1, PSEUDO-β-D-ARABINOFURANOSYLURACIL FROM D-ARABINOSE -

Masayuki Yoshikawa; Nobutoshi Murakami; Yasunao Inoue; Shoko Hatakeyama; Isao Kitagawa

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Masayuki Yoshikawa

Osaka University

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Hirotaka Shibuya

Osaka University

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Nobutoshi Murakami

Nagoya City University

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Johji Yamahara

Kyoto Pharmaceutical University

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Emiko Harada

Kyoto Pharmaceutical University

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Kazuyoshi Ohashi

Kyoto Pharmaceutical University

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Motomasa Kobayashi

Kindai University

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Toshiyuki Murakami

Kyoto Pharmaceutical University

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Hisashi Matsuda

Kyoto Pharmaceutical University

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Keiko Kawashima

Osaka University

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