Abstract
The phytochemical investigation has been performed for Euphorbia ebracteolata, the roots of which are usually used natural medicine in traditional Chinese medicine for the treatments of tuberculosis and bacterial infection. A diterpenoid has been obtained using silica gel and ODS column chromatography. Furthermore, on the basis of widely spectroscopic data analyses, including 1D-, 2D-NMR, HR-ESIMS and ECD, the isolated compound was determined to be a rosane type diterpenoid, which possessed a rare aromatic ring. The isolated diterpenoid as a new compound was named ebraphenol E (1). The bioactivity of isolated diterpenoid (1) has been evaluated and moderate inhibitory effect on lipase (IC50 = 12.5 μM) was observed. In combination with our previous phytochemical investigations about E. ebracteolata, the chemotaxonomic significance of diterpenoids was summarized for E. ebracteolata.
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