(3R,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]-3-methyl-dihydro-furan-2-one 在
lithium aluminium tetrahydride 作用下,
以91%的产率得到(2R,4S)-2-Isopropyl-5-((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)-2-methyl-hexane-1,4-diol