31230-09-8 methyl (2a'S,3aS,5a'R,8aS,12b'R,13aR,14R,15aR,15a'R,15bS,17R)-12-methoxy-1,2,4,4',5,5',6',7,8,8',13',14,14',15-tetradecahydro-3aH,13H-spiro[8a,14-ethanocyclopenta[ij]furo[3,2-a]indolo[3,2-h]quinolizine-17,2'-furo[2',3':7,8]indolizino[8,1-cd]carbazole]-7'-