(20R)-5-cyano-21-cyclohexyl-20-methyl-5α-pregn-8-en-3-one 、
硼氢化钠 以After column chromatography 36 mg (20R)-5-cyano-21-phenyl-20-methyl-5α-pregn-8-en-3β-ol and 46 mg (20R)-5-cyano-21-phenyl-20-methyl-5α-pregn-8-en-3α-ol were isolated的产率得到(20R)-5-cyano-21-phenyl-20-methyl-5α-pregn-8-en-3β-ol