(2S)-5-amino-2-[({5-[bis(4-chlorophenyl)methyl]thiophen-2-yl}carbonyl)amino]pentanoic acid trifluoroacetate   、                                                                                      
乙醇   、                                                                                      
acetamide hydrochloride                                                                                                                                                                                              以
                                                                                         
三乙胺                                                                                  为溶剂,
                                                                                                                                                                                        以to give (2S)-2-[({5-[bis(4-chlorophenyl)methyl]thiophen-2-yl}carbonyl)amino]-5-(ethanimidoylamino)pentanoic acid•TFA (125, 38 mg) as a white solid的产率得到(2S)-2-[({5-[bis(4-chlorophenyl)methyl]thiophen-2-yl}carbonyl)amino]-5-(ethanimidoylamino)pentanoic acid trifluoroacetate