benzhydryl (2S,4aS,6aS,6bR,8aR,10S,12aS,12bR,14bR)-2,4a,6a,6b,9,9,12a-heptamethyl-10-(methylsulfonamido)-13-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydropicene-2-carboxylate 在
palladium 10% on activated carbon 、
氢气 、
溶剂黄146 作用下,
以
甲醇 、
乙酸乙酯 为溶剂,
以98.6%的产率得到(3β,18β,20β)-3-methylsulfonylamino-11-oxo-olean-12-en-29-oic acid