(2S,4R)-4-(2-chlorobenzenesulfonyl)-2-(1-cyanocyclopropylcarbamoyl)pyrrolidine hydrochloric acid 、
聚合甲醛 以to give (2S,4R)-4-(2-chloro-benzenesulfonyl)-1-methyl-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide as a colorless oil的产率得到(2S,4R)-4-(2-chloro-benzenesulfonyl)-1-methyl-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide