cholest-5-en-3β,25,26-triol-23-on 3-methoxyethoxymethyl ether 25,26-acetonide 在
sodium tetrahydroborate 、
对甲苯磺酰肼 作用下,
生成 (R)-4-{(R)-4-[(3S,8S,9S,10R,13R,14S,17R)-3-(2-Methoxy-ethoxymethoxy)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-pentyl}-2,2,4-trimethyl-[1,3]dioxolane