ethyl 5-amino-1-cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate 、
2,6-dimethylpiperazine 以to give ethyl 5-amino-1-cyclopropyl-6-fluoro-7-(cis-3,5-dimethyl-1-piperazinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylate的产率得到ethyl 5-amino-1-cyclopropyl-6-fluoro-7-(cis-3,5-dimethyl-1-piperazinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylate