培氟沙星

诺氟沙星

7-chloro-1-ethyl-1,4-dihydro-4-oxo-6-(1-piperazinyl)quinoline-3-carboxylic acid

1-乙基-6-氟-4-氧代-7-(3-氧代哌嗪-1-基)喹啉-3-羧酸

7-chloro-1-ethyl-6-fluoro-2,3-dihydroquinolin-4-one