✦ LIBER ✦

Structure elucidation of three new acetylated flavonoid glycosides from Centaurium spicatum

✍ Scribed by Abdelaaty A. Shahat; Sandra Apers; Sabine Van Miert; Magda Claeys; Luc Pieters; Arnold Vlietinck

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 100 KB
Volume: 39
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.900

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✦ Synopsis

Abstract

Three new acetylated flavonol glycosides, quercetin 3‐O‐(2,3,4‐triacetyl‐α‐rhamnopyranosyl)‐(1 → 6)‐β‐galactopyranoside, quercetin 3‐O‐[(2,3,4‐triacetyl‐α‐rhamnopyranosyl)‐(1 → 6)]‐3‐acetyl‐β‐galactopyranoside and quercetin 3‐O‐[(2,3,4‐triacetyl‐α‐rhamnopyranosyl)‐(1 → 6)]‐4‐acetyl‐β‐galactopyranoside, were isolated from Centaurium spicatum (L.) Fritsch (Gentianaceae). Structure elucidation, especially the localization of the acetyl groups, and complete ^1^H and ^13^C NMR assignments of these biologically active compounds were carried out using one‐ and two‐dimensional NMR methods, including ^1^H and ^13^C NMR, DEPT‐135 and DEPT‐90 and gradient‐assisted experiments such as DQF‐COSY, TOCSY, HSQC and HMBC experiments. Copyright © 2001 John Wiley & Sons, Ltd.

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