IUPAC:(3S,5R)-3-[(1S,3aS,5aR,9aS,11aS)-3a,6,6,9a,11a-pentamethyl-7-oxo-1H,2H,3H,3aH,5H,5aH,6H,7H,8H,9H,9aH,11H,11aH-cyclopenta[a]phenanthren-1-yl]-5-(2-methylprop-1-en-1-yl)oxolan-2-one
IUPAC:(3S,5R)-3-[(1S,3aS,5aR,9aS,11aS)-3a,6,6,9a,11a-pentamethyl-7-oxo-1H,2H,3H,3aH,5H,5aH,6H,7H,8H,9H,9aH,11H,11aH-cyclopenta[a]phenanthren-1-yl]-5-(2-methylprop-1-en-1-yl)oxolan-2-one