(2S,4R)-4-(2-chloro-benzenesulfonyl)-pyrrolidine-2-carboxylic acid cyanomethyl-amide hydrochloride 、
1-苯基-2,2,2-三氟乙醇 以to give (2S,4R)-4-(2-chloro-benzenesulfonyl)-1-(2,2,2-trifluoro-1-phenyl-ethyl)-pyrrolidine-2-carboxylic acid cyanomethyl-amide as a white amorphous solid的产率得到(2S,4R)-4-(2-chloro-benzenesulfonyl)-1-(2,2,2-trifluoro-1-phenyl-ethyl)-pyrrolidine-2-carboxylic acid cyanomethyl-amide