Ananosic acids B and C, two new 18(13-->12)-abeo-lanostane triterpenoids from Kadsura ananosma.

Two new 18(13→12)-abeo-lanostane triterpenoid acids, ananosic acids B (1) and C (2), were isolated from the stems of Kadsura anaosma. Their structures were elucidated by spectral studies and chemical transformation. Compounds 1 and 2 were evaluated for cytotoxicity using CCRF-CEM leukemia cells and HeLa cells.