Oxoenoxacin

3-Oxoenoxacin

4-oxo-enoxacin

6-Fluoro-7-(3-oxopiperazin-1-yl)-1-ethyl-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid

1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(3-oxo-1-piperazinyl)-1,8-naphthyridine-3-carboxylic acid