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