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New Acylated Secoiridoid Glucosides from Gentiana straminea (Gentianaceae)

✍ Scribed by Min Xu; Ming Zhang; Ying-Jun Zhang; Chong-Ren Yang

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
176 KB
Volume
92
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

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Two new acylated secoiridoid glucosides, 4′‐acetyl‐6′‐{[2‐hydroxy‐3‐(1‐β‐D‐glucopyranosyloxy)]benzoyloxy}sweroside and 3′,4′‐diacetyl‐6′‐{[2‐hydroxy‐3‐(1‐β‐D‐glucopyranosyloxy)]benzoyloxy}swertiamarin, named gentistraminosides A (1) and B (2), were isolated from the MeOH extract of Gentiana straminea Maxim (Gentianaceae), together with twelve known ones, including eight iridoid and secoiridoid glucosides, macrophylloside A (3), loganic acid (4), secologanic acid (5), swertiamarin (6), gentiopicroside (7), loganic acid methyl ester (8), 6′‐O‐β‐D‐glucopyranosyl gentiopicroside (9), and loganic acid 11‐O‐β‐D‐glucopyranosyl ester (10), one flavone C‐glucoside, isovitexin (11), one chromenecarboxylic acid glycosyl ester, macrophylloside D (12), and two triterpenoids, 1__α__,2__α__,3__β__,24‐tetrahydroxyolean‐12‐en‐28‐oic acid (13), and 3__β__,6__α__,24‐trihydroxyolean‐12‐en‐28‐oic acid (14). Their structures were determined by means of detailed spectroscopic (NMR and MS) analysis.

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