Studies on the Constituents of Iris florentina L. II. C-Glucosides of Xanthones and Flavones from the Leaves
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概要
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Four C-glucosylxanthones [Mangiferin (3), isomangiferin (2), 4 and 5] and three C-glucosylflavones [swertisin (6), isoswertisin (7) and isoswertiajaponin (8)] were isolated from the fresh leaves of Iris florentina L. (Iridaceae). The structures of 4 and 5 were shown to be 7-O-methylmangiferin and 7-O-methylisomangiferin, respectively, by chemical and spectroscopic methods. In addition, the ^<13>C nuclear magnetic resonance chemical shifts of aryl carbons in these C-glucosylxanthones (2-5) were assigned. On the basis of the co-occurrence of several types of xanthone and flavone C-glucosides, the biosynthetic relationship between both C-glucosides is briefly discussed.
- 1982-07-25
著者
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井上 隆夫
科学警察研究所
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井上 隆夫
Hoshi College of Pharmacy
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藤田 正雄
Faculty Of Pharmaceutical Sciences:hoshi University
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藤田 正雄
Hoshi College of Pharmacy
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藤田 正雄
星薬科大学薬学部:(現)株式会社ウチダ和漢薬研究開発室
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