3-Oxo-21α-methoxy-24,25,26,27-tetranortirucall-7-ene-23(21)-lactone
3-Oxo-21α-methoxy-24,25,26,27-tetranortirucall-7-ene-23(21)-lactone is a natural product isolated and purified from the stem barks of Aphanamixis grandifolia showing cytotoxic activities against five tumor cell lines (MCF-7, HeLa, HepG2, SGC-7901 and BGC-823).