三氟乙酸   、                                                                                      
                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以39%的产率得到(S)-2-Amino-3-{4-[(1S,3R)-1-((S)-2-tert-butylcarbamoyl-4-pyridin-3-ylmethyl-piperazin-1-ylmethyl)-3-((1S,2R)-2-hydroxy-indan-1-ylcarbamoyl)-4-phenyl-butoxycarbonylmethoxy]-phenyl}-propionic acid; compound with trifluoro-acetic acid