培氟沙星

诺氟沙星

1-乙基-6-氟-4-氧代-7-(3-氧代哌嗪-1-基)喹啉-3-羧酸

7-氯-1-乙基-6-氟-1,4-二氢-4-羰基喹啉-3-羧酸

1-tert-butyl-6-fluoro-4-oxo-7-piperazin-1-ylquinoline-3-carboxylic acid