(2R,4R)-2-((2S,4aR,4bS,6aR,7R,9R,9aS,9bR,9cR,12aR,12bS)-9-(benzoyloxy)-2-((tert-butyldiphenylsilyl)oxy)-4a,6a-dimethylhexadecahydro-1H-cyclopenta[1,2]phenanthro[9,10-d][1,3]dioxol-7-yl)-6-methylheptan-4-yl benzoate