(2S,4R)-4-benzenesulfonyl-2-(1-cyanocyclopropylcarbamoyl)pyrrolidine trifluoroacetic acid 、
四氢吡喃-4-甲酸 、 以to give (2S,4R)-4-benzenesulfonyl-1-(tetrahydro-pyran-4-carbonyl)-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide as a colorless oil的产率得到(2S,4R)-4-benzenesulfonyl-1-(tetrahydro-pyran-4-carbonyl)-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide