IUPAC: (1R,3aS,3bR,9aR,9bS,11aS)-11a-ethyl-1-ethynyl-7-oxo-1H,2H,3H,3aH,3bH,4H,5H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-1-yl butanoate

SMILES: [H][C@@]12CC[C@@](OC(=O)CCC)(C#C)[C@@]1(CC)CC[C@]1([H])[C@@]3([H])CCC(=O)C=C3CC[C@@]21[H] |c:27|