Ethyl 4-(2-ethoxy-2-oxoethyl)-3-hydroxy-5-oxo-4,7,10-triazatetracyclo[7.7.0.02,6.011,16]hexadeca-1,6,8,11,13,15-hexaene-10-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
sodium ethanolate                                                                                                                                  作用下,
                                                                                                                                                                                        反应 3.0h,
                                                                                                                以49%的产率得到Ethyl 2-(3-hydroxy-5-oxo-4,7,10-triazatetracyclo[7.7.0.02,6.011,16]hexadeca-1,6,8,11,13,15-hexaen-4-yl)acetate