5-(3-{[((1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-hydroxy-1-isopropenyl-5a,5b,8,8,11a-pentamethylicosahydrocyclopenta[a]chrysene-3a-carbonyl)amino]methyl}benzoylamino)pentanoic acid 在
Jones reagent 作用下,
以
丙酮 为溶剂,
以85%的产率得到5-(3-{[((1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-hydroxy-1-isopropenyl-5a,5b,8,8,111a-pentamethylicosahydrocyclopenta-[a]chrysene-3a-carbonyl)amino]methyl}benzoylamino)pentanoic acid