(+/-)-ethyl 9,10-difluoro-2,3-dihydro-3-(3,5-dinitrobenzoyloxy)methyl-7-oxo-7H-pyrido<1,2,3-de><1,4>benzoxazine-6-carboxylate
(+)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido<1,2,3-de><1,4>benzoxazine-6-carboxylic acid
levofloxacin Q-acid
(+)-ethyl 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido<1,2,3-de><1,4>benzoxazine-6-carboxylate
ethyl (S)-(-)-9,10-Difluoro-3-Methyl-7-Oxo-2,3-Dihydro-7H-Pyrido[1,2,3-de]-[1,4]Benzoxazine-6-Carboxylate