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Complete assignments of 1H and 13C NMR spectral data for three sesquiterpenoids from Inula helenium

✍ Scribed by Yan Huo; Haiming Shi; Mengyue Wang; Prof. Xiaobo Li

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
95 KB
Volume
46
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The complete assignments of all the ^1^H and ^13^C NMR signals of three sesquiterpene lactones, 4‐oxo‐5(6),11‐eudesmadiene‐8,12‐olide (1), 4‐oxo‐11‐eudesmaene‐8,12‐olide (2) and (1(10)E)‐5β‐Hydroxygermacra‐1(10),4(15),11‐trien‐8, 12‐olide (3), were carried out by various 2D NMR experiments. Compounds 1–3 were isolated from the roots of Inula helenium for the first time. Among them, 1 was identified as a new nor‐sesquiterpene lactone, and 2 was isolated from a natural source for the first time. The ^13^C‐NMR data of compound 3 was also reported for the first time. Copyright © 2008 John Wiley & Sons, Ltd.

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