methyl (R)-4-((3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-acetamido-7,12-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate 在
lithium hydroxide 、
盐酸 作用下,
以
四氢呋喃 、
甲醇 、
水 为溶剂,
以100%的产率得到(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-acetamido-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid