Euphane triterpenoids of Cassipourea lanceolata from the Madagascar rainforest

A Madagascar collection of the leaves and fruit of Cassipourea lanceolata Tul. led to the isolation of three euphane triterpenoids 1-3. The three compounds showed weak antiproliferative activities against the A2780 human ovarian cancer cell line, with IC50 values of 25, 25 and 32 μM, respectively.