6-Fluoro-7-(4-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-quinoline-3-carbonitrile   、                                                                                      
2,6-二氟氯苄                                                                                                                                                                                                                                                                                                          以gave 1-(2,6-difluoro-benzyl)-6-fluoro-7-(4-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-quinoline-3-carbonitrile的产率得到1-(2,6-difluoro-benzyl)-6-fluoro-7-(4-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-quinoline-3-carbonitrile