1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-((4-p-nitrobenzol)-1-piperazinyl)quinoline-3-carboxylic acid 135038-30-1 3-Quinolinecarboxylic acid, 1-ethyl-6-fluoro-1,4-dihydro-7-(4-(4-nitrobenzoyl)-1-piperazinyl)-4-oxo- EFQCA