[(3S,5S,10S,13S,14R,17R)-10,13-dimethyl-17-[(2R)-6-methylhept-5-en-2-y l]-2,3,4,5,6,7,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthr en-3-yl] acetate