[(3R,1S)-3-(1H-1,2,4-Triazol-1-ylmethyl)cyclopentyl-N-BOC-amino]acetic acid 、
(2S,4S)-4-fluoropyrrolidine-2-carbonitrile; 4-methylbenzene-1-sulfonic acid 以to give 59.9 g of the product as a white solid的产率得到(2S,4S)-1-{2-[(3R,1S)-3-(1H-1,2,4-triazol-1-ylmethyl)cyclopentyl-N-BOC-amino]acetyl}-4-fluoropyrrolidine-2-carbonitrile