3-[(4-cyanobenzoyl)amino]benzoic acid 、
4-甲苯磺酸离子 、
L-Asparaginsaeure-α-methylester-β-tert-butylester 以
N,N-二甲基甲酰胺 为溶剂,
以There is isolated 3-(t-butoxycarbonyl)-N-[m-(p-cyanobenzamido)benzoyl]-L-alanine methyl ester in the form of colourless crystals的产率得到3-(t-butoxycarbonyl)-N-[m-(p-cyanobenzamido)benzoyl]-L-alanine methyl ester