Sesquiterpenoid monomers and dimers from the flower of Inula japonica Thunb. with antihepatoma activity
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In the chemical investigation of Inula japonica, a total of 13 sesquiterpenoids (1-13), including eudesmane- and 1,10-secoeudesmane-type compounds, as well as their dimers, were obtained. Among them, three new dimeric sesquiterpenoids, inujaponolides A-C (1-3)... ...