Abstract
Four new pseudoguaianolides (1-4), one new guaianolide (5), together with ten known compounds (6-15) were isolated from the aerial parts of Inula hupehensis. Their structures were elucidated mainly on the basis of 1D and 2D spectroscopic methods and circular dichroism analysis. In addition, compounds 1-10 and 13 were tested for their inhibitory effects against LPS-induced NO production in RAW264.7 macrophages. Compounds 2, 6, 8 and 9 exhibited significant inhibitory activities with IC50 values in the range of 0.6-6.6 μM.
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