IUPAC:(1S,3aS,3bS,9aS,9bS,11aS)-1-[(1,2-13C2)acetyl]-9a,11a-dimethyl(6,7,8-13C3)-1H,2H,3H,3aH,3bH,4H,5H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one
IUPAC:(1S,3aS,3bS,9aS,9bS,11aS)-1-[(1,2-13C2)acetyl]-9a,11a-dimethyl(6,7,8-13C3)-1H,2H,3H,3aH,3bH,4H,5H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one