(2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)pyrrolidine-2-carboxamide 、
lithium 1-(1-acetyl-piperidin-4-yl)-azetidine-2-carboxylic acid 以yielded (2S,4R)-1-(1-(1-acetylpiperidin-4-yl)azetidine-2-carbonyl)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)pyrrolidine-2-carboxamide 1:1 epimers as an off-white solid (93%)的产率得到(2S,4R)-1-(1-(1-acetylpiperidin-4-yl)azetidine-2-carbonyl)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)pyrrolidine-2-carboxamide