甲醛

1-乙烯基-6-氟-4-氧代-7-哌嗪-1-基-1,8-萘啶-3-羧酸

ethyl 7-(4-acetyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate

ethyl 7-(4-acetyl-1-piperazinyl)-1-(2-chloroethyl)-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate

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