1-[(2S,3S)-3-[N2-(4-bromoacetamidophenoxy)acetyl-L-asparaginyl]amino-2-hydroxy-4-phenylbutyryl]-N-t-butyl-L-prolinamide   、                                                                                      
N-(2-氨基乙基)吗啉                                                                                                                                                                                                                                                                                                          以17 mg of the title compound were obtained as a colorless powder, melting at 123°-132° C.的产率得到1-{(2S,3S)-3-[N2-{4-[N-(2-Morpholinoethyl)aminoacetyl]aminophenoxy}acetyl-L-asparaginyl]amino-2-hydroxy-4-phenylbutyryl}-N-t-butyl-L-prolinamide