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Itosides A – I, New Phenolic Glycosides from Itoa orientalis

✍ Scribed by Xing-Yun Chai; Zheng-Ren Xu; Hong-Yan Ren; Hai-Ming Shi; Ya-Nan Lu; Fei-Fei Li; Peng-Fei Tu

Publisher
John Wiley and Sons
Year
2007
Tongue
German
Weight
197 KB
Volume
90
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

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 I (9) were isolated from 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 β‐D‐glucopyranoside. The structures of the new compounds were elucidated by spectral and chemical methods.

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