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Complete assignments of 1 H and 13 C NMR spectral data for three sesquiterpenoids from Inula helenium
Author(s) -
Huo Yan,
Shi Haiming,
Wang Mengyue,
Li Xiaobo
Publication year - 2008
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2340
Subject(s) - chemistry , inula , sesquiterpene , stereochemistry , carbon 13 nmr , sesquiterpene lactone , proton nmr , alternative medicine , pathology , traditional chinese medicine , medicine
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.