(2S,6S)-7-Methoxy-2-((3S,8S,9S,10R,13S,14S,17R)-3-methoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-6-methyl-heptan-3-one 在
吡啶 、 sodium tetrahydroborate 作用下,
以
乙醇 为溶剂,
生成 2-Nitro-benzoic acid (1R,4S)-5-methoxy-1-[(S)-1-((3S,8S,9S,10R,13S,14S,17R)-3-methoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-ethyl]-4-methyl-pentyl ester