4-amino-N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-L-phenylalanine methyl ester 、
2-甲基-5-硝基苯甲酸 以to give 23 mg (69%) of N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-4-[[(2-methyl-5-nitrophenyl)carbonyl]amino]-L-phenylalanine, HR—FAB—MS的产率得到N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-4-[[(2-methyl-5-nitrophenyl)carbonyl]amino]-L-phenylalanine