ethyl 7-chloro-1-ethyl-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate

ethyl 7-(4-acetyl-1-piperazinyl)-1-ethyl-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate

ethyl 7-(4-acetylpiperazin-1-yl)-6-amino-1-ethyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate

ethyl 7-(4-acetylpiperazin-1-yl)-1-ethyl-6-nitro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate

hexafluoro-l⁶-phosphane, 2-(4-acetylpiperazin-1-yl)-6-(ethoxycarbonyl)-8-ethyl-5-oxo-5,8-dihydro-1,8-naphthyridine-3-diazonium salt