5-benzoil-4-ammino-3-(2-piperidinoetiltio)tieno<3,2-d>isotiazolo 、 1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(4-cyano-piperazin-1-yl)-3-quinolinecarboxylic acid 生成 1-ethyl-6-fluoro-4-oxo-7-[4-(N'-propan-2-ylcarbamimidoyl)piperazin-1-yl]quinoline-3-carboxylic acid