17β-acetoxy-1,2α-methylene-6α,7α-epoxy-16β-isopropylandrost-4en-3-one 生成 Acetic acid (1S,2R,8R,9S,10S,13S,14S,16R,17S)-6-chloro-16-isopropyl-10,13-dimethyl-3-oxo-1,2,3,8,9,10,11,12,13,14,15,16,17,20-tetradecahydro-cyclopropa[1,2]cyclopenta[a]phenanthren-17-yl ester