6-Chlor-16-methylen-17α-acetoxy-pregnatrien-(1.4.6)-dion-(3.20) 在
吡啶 、 sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
生成 Propionic acid (3S,8R,9S,10R,13S,14S,17R)-17-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-3-yl ester