CC(C)/C(=C/C[C@@H](C)[C@H]1CCC2C3CC=C4C[C@@H](O)CC[C@]4(C)C3CC[C@@]21C)C(C)O (3S,10R,13R,17R)-17-[(Z,2R)-5-(1-hydroxyethyl)-6-methylhept-4-en-2-yl]-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol