IUPAC:(5R)-5-[(2R)-2-[(1R,3aR,5aR,7R,9aR,9bS,11aR)-7-methoxy-3a,6,6,9a,11a-pentamethyl-1H,2H,3H,3aH,5H,5aH,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-1-yl]propyl]-3-methyl-2,5-dihydrofuran-2-one
IUPAC:(5R)-5-[(2R)-2-[(1R,3aR,5aR,7R,9aR,9bS,11aR)-7-methoxy-3a,6,6,9a,11a-pentamethyl-1H,2H,3H,3aH,5H,5aH,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-1-yl]propyl]-3-methyl-2,5-dihydrofuran-2-one