1-[6-(1-Piperazinyl)-3-pyridinyl]ethanone

6-Fluoro-4-oxo-1-phenyl-7-piperazin-1-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester 1-Ethyl-6-fluoro-4-oxo-7-piperazin-1-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester 7-(4-Acetyl-piperazin-1-yl)-1-ethyl-6-fluoro-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid 1-Ethyl-6-fluoro-7-(4-formyl-piperazin-1-yl)-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid 5-Acetyl-6-methyl-2-(4-phenylpiperazino)nicotinonitrile

5-Acetyl-6-methyl-2-(4-methylpiperazino)nicotinonitrile 1-(6-[4-(4-Fluorophenyl)piperazino]-2-methyl-3-pyridinyl)-1-ethanone 6-Fluoro-4-oxo-1-phenyl-7-piperazin-1-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ENOXACIN GLUCONATE 1,8-Naphthyridine-3-carboxylic acid, 1,4-dihydro-1-ethenyl-6-fluoro-4- oxo-7-(1-piperazinyl)-,monohydrochloride

6-Fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-1-vinyl-1,8-naphthyridine -3-carboxylic acid 1,8-Naphthyridine-3-carboxylic acid, 1,4-dihydro-6-fluoro-1-(2-fluoroe thyl)-4-oxo-7-(1-piperazinyl)- 1,8-Naphthyridine-3-carboxylic acid, 1,4-dihydro-1-ethyl-6-fluoro-4-ox o-7-(1-piperazinyl)-, monomethanesulfonate Enoxacin 1-tert-Butyl-6-fluoro-7-(-3-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-[ 1,8]naphthyridine-3-carboxylic acid