科研之友
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摘要
Eight new benzoylated gentisyl alcohol (=2-(hydroxymethyl)benzene-1,4-diol) glucosides, itosides A-H (1-8), together with the new pyrocatechol (= benzene- 1,2-diol) glycoside itoside 1 (9) were isolated front the bark and twigs of Itoa orientalis (Flacourtiaceae). In itosides B-D (2-4), the gentisyl alcohol moiety was esterified by 1-hydroxy-6-oxocyclohex-2-ene-1-carboxylic acid, while itosides E-H (5-8) contained instead an additional 2-hydroxybenzoic acid moiety. The compounds were accompanied by the known derivatives 4-hydroxytremulacin (10), poliothyrsoside (11), poliothyrsin (12). homaloside D (13), tremulacin, and pyrocatechol beta-D-glucopyranoside. The structures of the new compounds were elucidated by spectral and chemical methods.
- 出版日期2007
- 单位北京大学
