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Three New Sesquiterpenoids from Echinops ritro L.

✍ Scribed by Liang-Bo Li; Jie Ren; Zheng-Ming Cheng; Hua-Jie Zhu

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
166 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

From the whole plants of E. ritro L., the three new sesquiterpenoids (3__α__,4__α__,6__α__)‐3,13‐dihydroxyguaia‐7(11),10(14)‐dieno‐12,6‐lactone (1), (3__α__,4__α__,6__α__,11__β__)‐3‐hydroxyguai‐1(10)‐eno‐12,6‐lactone (2), and (11__α__)‐11,13‐dihydroarglanilic acid methyl ester (=(4__β__,6__α__,11__α__)‐4,6‐dihydroxy‐1‐oxoeudesm‐2‐en‐12‐oic acid methyl ester; 3), together with eight known sesquiterpenoids, were isolated. Their structures were elucidated through analysis of spectroscopic data including extensive 2D‐NMR.

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