(5S,8S,9S,11S,13S,14S,17R)-chloromethyl17-((ethoxycarbonyl)oxy)-11-hydroxy-5,13-dimethyl-2-oxo-5,6,7,8,9,11,12,13,14,15,16,17-dodecahydro-2H-cyclopenta[a]phenanthrene-17-carboxylate