C=C(CC[C@@H](C)[C@H]1CC=C2C3=C(C(=O)[C@H](OC(C)=O)[C@@]21C)[C@@]1(C)C[C@@H](O)[C@H](O)C(C)(C)[C@@H]1CC3)C(C)C [(2R,3R,5R,10S,12R,13R,17R)-2,3-dihydroxy-4,4,10,13-tetramethyl-17-[(2R)-6-methyl-5-methylideneheptan-2-yl]-11-oxo-2,3,5,6,7,12,16,17-octahydro-1H-cyclopenta[a]phenanthren-12-yl] acetate