N-[N-[N-[[2-(p-amidinophenyl)-1,3-dioxolan-2-yl]acetyl]glycyl]-L-α-aspartyl]-3-phenyl-L-alanine trifluoroacetate                                                                                                                                                              在
                                                                                                                                                                                 Acetonitrile water water                                                                                                                                  作用下,
                                                                                                                以
                                                                                         Trifluoroacetic acid monohydrate                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以are obtained 33 mg of N-[N-[N-[(p-amidinobenzoyl)acetyl]glycyl]-L-aspartyl]-3-phenyl-L-alanine trifluoroacetate (1:1), m.p. 225°-230° C. (decomposition)的产率得到N-[N-[N-[(p-amidinobenzoyl)acetyl]glycyl]-L-aspartyl]-3-phenyl-L-alanine trifluoroacetate