(4R)-tert-Butyldimethylsilyl 4-((3S,7R,8R,9S,10S,13R,14S,17R)-7-Hydroxy-10,13-dimethyl-3-((tetrahydro-2H-pyran-2-yl)oxy)hexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate