Acetic acid (8R,9R,10S,13S,14S,17R)-3-acetoxy-17-acetyl-10,13-dimethyl-16-methylene-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl ester 生成 Acetic acid (3R,8R,9R,10S,13S,14S,17R)-3-acetoxy-17-acetyl-6-chloro-10,13-dimethyl-16-methylene-2,3,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl ester