(3S,4S,5R,8R,9R,10R,13S,14R,15S)-4-(2-Cyano-ethyl)-15-isopropyl-4,9,10-trimethyl-3-((R)-1-methyl-2-oxo-ethyl)-hexadecahydro-cyclopenta[a]phenanthrene-13-carboxylic acid methyl ester