1,4-Dihydro-1-(tert-butyl)-6-fluoro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid 116162-74-4 3-Quinolinecarboxylic acid, 1,4-dihydro-1-(1,1-dimethylethyl)-6-fluoro-4-oxo-7-(1-piperazinyl)- 3-Quinolinecarboxylic acid, 1-(1,1-dimethylethyl)-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)- BRN 3626399