methyl 4-[[(2S,4aS,6aR,6aS,6bR,8aR,10S,12aS,14bR)-10-acetyloxy-2,4a,6a,6b,9,9,12a-heptamethyl-13-oxo-3,4,5,6,6a,7,8,8a,10,11,12,14b-dodecahydro-1H-picene-2-carbonyl]amino]butanoate 在
sodium hydroxide 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 24.0h,
以97%的产率得到4-[((2S,4aS,6aS,6bR,8aR,10S,12aS,12bR,14bR)-10-Hydroxy-2,4a,6a,6b,9,9,12a-heptamethyl-13-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydro-picene-2-carbonyl)-amino]-butyric acid