Artemisiverins A1-A32, structurally diverse guaiane-type sesquiterpenoid dimers from Artemisia sieversiana and their antihepatoma activity.
Artemisiverins A1-A32 (1‒32), undescribed guaiane-type sesquiterpenoid dimers, and 23 known analogues (33‒55) were obtained from Artemisia sieversiana Ehrhart ex Willd. (Asteraceae). The structures of compounds 1‒32 were identified through comprehensive spectroscopic analysis, ECD calculations, and X-ray diffraction. T...