Four new C-glycosidic ellagitannins, castacrenins D-G, from Japanese chestnut wood (Castanea crenata SIEB. et Zucc.)

作者：Tanaka T; Ueda N; Shinohara H; Nonaka G; Kouno I

来源：Chemical & Pharmaceutical Bulletin, 1997, 45(11): 1751-1755.

• tannin
• Castanea crenata
• ellagitannin
• polyphenol
• chestnut

In the course of studies on polyphenol metabolism in wood, four new C-glycosidic ellagitannins named castacrenins D-G were isolated from the wood of the Japanese chestnut tree (Castanea crenata). Castacrenins D and F are related to vescalagin and have a gallic acid and an ellagic acid moiety, respectively. Castacrenins E and G are oxidative metabolites of castacrenins D and F, respectively, in which a pyrogallol ring of each C-glycosidic ellagitannin unit is replaced by a cyclopentenone ring.

• 出版日期1997-11