(6aR,15aS,Z)-7,15-dimethyl-2,5,6,6a,7,8,9,10,11,12,13,14,15,15a-tetradecahydro-1H-7,15:8,12:10,14-trimethanocycloocta[4,5]benzo[1,2][9]annulen-16-one

5,13-dimethyl-2-phenyl-6,7,8,9,10,11,12,13-octahydro-1H,5H-5,13:6,10:8,12-trimethanocyclonona[d][1,2,4]triazolo[1,2-a]pyridazine-1,3,15(2H)-trione