(8S,9S,10R,13R,14S,17R)-17-[(R)-2-((R)-2-Isopropyl-3-methyl-cycloprop-1-enyl)-1-methyl-ethyl]-10,13-dimethyl-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-3-one 在
sodium tetrahydroborate 作用下,
以
异丙醇 为溶剂,
生成 (3R,8S,9S,10R,13R,14S,17R)-17-[(R)-2-((R)-2-Isopropyl-3-methyl-cycloprop-1-enyl)-1-methyl-ethyl]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol 、
(28R)-calysterol