methyl ((5R,8R,9S,10S,13S,14S)-10,13-dimethyl-2,3,4,5,6,7,8,9,10,11,12,13,14,15-tetradecahydro-1H-cyclopenta[a]phenanthrene-17-carbonyl)-L-methioninate 在
sodium hydroxide 、
水 、
盐酸 作用下,
以
乙醇 、
水 为溶剂,
以84%的产率得到(2S)-2-[[(5R,8R,9S,10S,13S,14S)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15-dodecahydro-1H-cyclopenta[a]phenanthrene-17-carbonyl]amino]-4-methylsulfanylbutanoic acid