IUPAC: (3aS,3bR,9aR,9bS,11aS)-9a,11a-dimethyl-5-methylidene-1H,2H,3H,3aH,3bH,4H,5H,7H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthrene-1,7-dione

SMILES: C[C@]12CC[C@H]3[C@@H](CC(=C)C4=CC(=O)C=C[C@]34C)[C@@H]1CCC2=O |c:13,t:9|