Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Tannins and Related Compounds. LXXV. : Isolation and Characterization of Novel Diastereoisomeric Ellagitannins, Nupharins A and B, and Their Homologues from Nuphar japonicum DC.
石松 真田中 隆野中 源一郎西岡 五夫西澤 信山岸 喬
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キーワード: α-D-glucose
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1989 年 37 巻 1 号 p. 129-134

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The diastereoisomeric ellagitannins, nupharins A (1) and B (11), and related compounds (8, 10, and 15), have been isolated from the rhizomes of Nuphar japonicum DC. (Nymphaeaceae). One the basis of physicochemical evidence, their structures were characterized as 1, 2, 4-tri-O-galloyl-(1) and 1, 2-di-O-galloyl-3, 6-(S)-hexahydroxydiphenoyl-α-D-glucopyranoses (8), 2-O-galloyl-3, 6-(S)-hexahydroxydiphenoyl-D-glucose (10), and 1, 2, 4-tri-O-galloyl- (11) and 1, 2-di-O-galloyl-(R)-hexahydroxydiphenoyl-α-D-glucopyranoses (15).

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