1-ethyl-8-difluoromethoxy-6-fluoro-4-oxo-(4-pyrimidinylpiperazine-1-yl)-1,4-dihydroquinoline-3-carboxylic acid
1-ethyl-8-difluoromethoxy-6-fluoro-4-oxo-(4-pyrimidinylpiperazine-1-yl)-1,4-dihydroquinoline-3-carboxylic acid