Abstract
Four samples of Ligularia virgaurea collected in China afforded three new eremophilane sesquiterpenoids, one new norsesquiterpenoid, and two new dinorsesquiterpenoids as well as 28 known compounds. All the four samples belonged to the ligularol type (L type), one of the five chemotypes we have described for this species. The configuration of the previously reported eremophila-7(11),9-dien-12,8-olide is revised to be H-8α. The absolute configuration of ethyl 8-oxoeremophila-7(11),9-dien-12-oate was established to be 4 S,5 R by a DFT calculation.
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