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Abstract
A new sesquiterpenoid, vernocinolide A (1), as well as ten known ones (2–11), were isolated from the ethyl acetate soluble fraction of Vernonia cinerea. The structure of vernocinolide A (1) was elucidated by spectroscopic methods. Among the known sesquiterpenoids, nine of them were isolated from this plant for the first time.
Acknowledgements
Financial support of the National Scientific Foundation (30025044) and the foundation from the Ministry of Sicience and Technology (2002CB512807) are gratefully acknowledged.