Amidinoessigsaeureisopropylester   、                                                                                      
2-[1-(3-Nitro-phenyl)-meth-(Z)-ylidene]-3-oxo-butyric acid 2-(4-o-tolyl-piperazin-1-yl)-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
sodium                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以69.5%的产率得到2-Amino-6-methyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-isopropyl ester 5-[2-(4-o-tolyl-piperazin-1-yl)-ethyl] ester