氧氟沙星

N-甲基哌嗪

(R)-(+)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid

左氧氟单酯

3-(2,3,4,5-tetrafluorophenyl)-3-oxo-2-(ethoxymethylene)-propanoic acid ethyl ester