英文别名1-Ethyl-6-fluoro-1,4-dihydro-7-(4-hydroxy-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid; Norfloxacin N-Hydroxy Impurity; Norfloxacin Impurity 10; Norfloxacin Impurity 25; 1-ethyl-6-fluoro-7-(4-hydroxypiperazin-1-yl)-4-oxoquinoline-3-carboxylic acid; 1-Ethyl-6-fluoro-7-(4-hydroxypiperazin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 
