3-[N-(tert-butoxycarbonyl)-N-[2-[5-(4-cyclobutyl-3-trifluoromethylbenzyloxy)indolin-1-yl]-2-oxoethyl]amino]propionic acid tert-butyl ester   、                                                                                      
三氟乙酸                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 9.0h,
                                                                                                                以whereby the title compound (259 mg) was yielded的产率得到3-[N-[2-[5-(4-cyclobutyl-3-trifluoromethylbenzyloxy)indolin-1-yl]-2-oxoethyl]amino]propionic acid trifluoroacetate