1-[4-bromo-N-[(phenoxy)cyanoiminomethyl]-3,5-dimethyl-D,L-phenylalanyl]-4-(1-piperidinyl)-piperidine 、
3-(哌啶-4-基)-3,4-二氢喹唑啉-2(1H)-酮 以45%的产率得到1-[4-bromo-N-[[4-(3,4-dihydro-2(1H)-oxoquinazolin-3-yl)-1-piperidinyl]cyanoiminomethyl]-3,5-dimethyl-D,L-phenylalanyl]-4-(1-piperidinyl)-piperidine