Isolation and Structures of Procyanidins(Condensed Tannins) from Rhaphiolepis umbellata(Organic Chemistry)
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概要
- 論文の詳細を見る
Two new procyanidin trimers(1, 3) and one tetramer (2) were isolated in their free phenolic forms from the bark of Rhaphiolepis umbellata, which is used as the dyeing agent for Oshima Tsumugi. On the basis of 1H- and 13C-NMR spectral examinations and the results of partially acid- catalyzed degradation, 1, 2 and 3 were characterized as epicatechin-(4β→8)-epicatechin-(4β→6)-epicatechin, epicatechin-(4β→8)-epicatechin-(4β→8)-epicatechin-(4β→6)-epicatechin and catechin- (4α→6)-epicatechin-(4β→8)-epicatechin, respectively. In addition, the occurrence of the known compounds, i.e., (-)-epicatechin(4), procyanidins B-1(9), B-2(5), B-5(6) and C-1(7), proanthocyanidin A-2(10), cinnamtannins A_1(8) and A_2(14), cinchonains Ia(11) and IIb(12), and (-)-catechin 7-O-β-D-glucopyranoside(13) in the bark of Rhaphiolepis umbellata was confirmed.
- 社団法人日本農芸化学会の論文
- 1986-08-23
著者
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ISHIMATSU Naoki
Kyushu Tokai University School of Agriculture
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NONAKA Gen-ichiro
Faculty of Pharmaceutical Sciences, Kyushu University
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NISHIOKA Itsuo
Faculty of Pharmaceutical Sciences, Kyushu University
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Nonaka G
Faculty Of Pharmaceutical Sciences Kyushu University
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Nishioka Itsuo
Faculty Of Pharmaceutical Sciences Kyushu University
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Nishioka Itsuo
Kyushu Tokai University School Of Agriculture
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Nonaka Gen-ichiro
Usaien Pharmaceutical Co. Ltd
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Nonaka Genichiro
Usaien Pharm. Co. Ltd.
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Nonaka Gen-ichiro
Faculty Of Pharmaceutical Sciences Kyushu University
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Nonaka Gen-ichiro
Usaien Pharmaceutical Co. Ltd.
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Hayashi K
Kawasaki Research Center T. Hasegawa Co. Ltd.
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Ezaki-furuichi Emiko
Department Of Agricultural Chemistry Faculty Of Agriculture Kyushu University
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HAYASHI Katsuya
Department of Agricultural Chemistry, Faculty of Agriculture, Kyushu University
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Nonaka Gen-ichiro
Faculty of Pharmaceutical Sci Kyushu Univ
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Nishioka Itsuo
Faculty of Pharmaceutical Sci Kyushu Univ
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