4-(((3S,4aR,6aR,6bS,8aS,11S,12aR,14aR,14bS)-11-((benzhydryloxy)carbonyl)-4,4,6a,6b,8a,11,14b-heptamethyl-14-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydropicen-3-yl)amino)-4-oxobutanoic acid 在
palladium 10% on activated carbon 、
氢气 、
溶剂黄146 作用下,
以
甲醇 为溶剂,
以49.7%的产率得到(3β,18β,20β)-11-oxo-3-succinylamino-olean-12-en-29-oic acid