科研之友
微信
新浪微博
Facebook
分享链接
摘要
Two novel glycosides, 4,5-dimethoxy-3-hydroxyphenol 1-O-beta-(6%26apos;-O-galloyl)-glucopyranoside (1) and (+)-2 alpha-O-galloyl lyoniresinol 3 alpha-O-beta-D-xylopyranoside (2), as well as a novel ellagitannin named epiquisqualin B (3), were isolated from sapwood of Quercus mongolica var. crispula along with 19 known phenolic compounds. The structures of the novel compounds were elucidated on the basis of chemical and spectroscopic investigation. Compound 2 is the first example of a lignan galloyl ester, and 3 is the oxidation product of vescalagin, which is the major ellagitannin of this plant.
- 出版日期2013-8
