(2R,4R)-2-((3S,8R,9S,10R,13R,14S,15R,17R)-15-(benzoyloxy)-3-((tert-butyldiphenylsilyl)oxy)-10,13-dimethyl-7-oxo-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-6-methylheptan-4-yl benzoate