(R)-4-[(3R,5R,7R,8R,9S,10S,12S,13R,14S,17R)-3-(2-Allyloxy-ethoxy)-7,12-dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-pentanoic acid methyl ester 在
sodium tetrahydroborate 、
sodium periodate 、
四氧化锇 作用下,
以
四氢呋喃 、
乙醚 、
乙醇 为溶剂,
反应 16.0h,
生成
(R)-4-{(3R,5R,7R,8R,9S,10S,12S,13R,14S,17R)-7,12-Dihydroxy-3-[2-(2-hydroxy-ethoxy)-ethoxy]-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl}-pentanoic acid methyl ester