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Two new triterpenoids, entanolide ( 1 ) and methyl 3,4-secotirucalla-23-oxo-4(28),7,24-trien-21-al-3-oate ( 2 ), together with nine known compounds ( 3-11 ), were isolated from the bark of  Entandrophragma angolense . Their structures were elucidated based on spectroscopic analyses, mainly 1 D and 2 D NMR spectral data. Compounds  1 - 6  and  8  were evaluated for their cytotoxicity against HepG2 cells, and compounds  2-5  exhibited weak activities.

Triterpenoids from the bark of Entandrophragma angolense