1,3-二甲基-6-氨基脲嘧啶   、                                                                                      
间硝基苯甲醛   、                                                                                      
2-<4-(3-chloro-4-methylphenyl)-1-piperazinyl>ethyl acetoacetate                                                                                                                                                                                              以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                                                        以54.9%的产率得到1,3,7-Trimethyl-5-(3-nitro-phenyl)-2,4-dioxo-1,2,3,4,5,8-hexahydro-pyrido[2,3-d]pyrimidine-6-carboxylic acid 2-[4-(3-chloro-4-methyl-phenyl)-piperazin-1-yl]-ethyl ester