氧氟沙星杂质  Ofloxacin impurity

YFX-A  9,10-difluoro-3-methyl-7-oxo-2,3dihydro-7H-[1,4]oxazino[2,3,4ij]quinoline-6-carboxylic acid  82419-35-0

YFX-D  10-fluoro-3-methyl-9-(4methylpiperazin-1-yl)-7-oxo-2,3-dihydro7H-[1,4]oxazino[2,3,4-ij]quinoline-6carboxylic acid  197291-75-1

YFX-E  9-fluoro-3-methyl-7-oxo-10-(piperazin-1yl)-2,3-dihydro-7H-[1,4]oxazino[2,3,4ij]quinoline-6-carboxylic acid  82419-52-1