(3S,5S)-3-Isopropyl-5-[1-((3S,8S,9S,10R,13S,14S,17R)-3-methoxymethoxy-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]-dihydro-furan-2-one 在
咪唑 、 lithium aluminium tetrahydride 、
lithium diisopropyl amide 作用下,
生成 (3S,5R)-5-(tert-Butyl-dimethyl-silanyloxymethyl)-2-((3S,8S,10R,13S,14S,17R)-3-methoxymethoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-5,6-dimethyl-heptan-3-ol