7-(3,5-Dimethyl-1-piperazinyl)-6-fluoro-1-(5-(4-methyl-1-piperazinyl)-2-pyridinyl)-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid AIDS-146698 AIDS146698 NSC674549 {1-[5-(4-Methyl-1-piperazinyl)-2-pyridyl]-6-fluoro-7-(3,5-di} methyl-1-piperazinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylic acid