甲酸 、
(S)-2-{[2-((S)-2-tert-Butoxycarbonylamino-4-methylsulfanyl-butyryl)-pyrazolidine-1-carbonyl]-amino}-3-phenyl-propionic acid methyl ester 在
ethyl 2-ethoxy-1,2-dihydroquinolinecarboxylate 作用下,
生成 methyl (2S)-2-[[2-[(2S)-2-formamido-4-methylsulfanylbutanoyl]pyrazolidine-1-carbonyl]amino]-3-phenylpropanoate