prop-2-enoyl 11-[(3S,8S,9R,10S,12R,13S,14R,15R,17S)-3,15-dihydroxy-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-12-yl]undecanoate