CC1(C)CCC[C@@]2(C)C1CC[C@]1(C)C2C[C@@H](O)[C@]2(C)C3=C(CCC12)COC3=O (5bR,11aS,13R,13aS)-13-hydroxy-5b,8,8,11a,13a-pentamethyl-4,5,5a,6,7,7a,9,10,11,11b,12,13-dodecahydro-3H-phenanthro[1,2-g][2]benzofuran-1-one