title: Synthetic antibacterials. V. 7-substituted 1-ethyl-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acids.
mesh_terms: D000890:Anti-Infective Agents / Q000138:chemical synthesis*; D008722:Methods; D008826:Microbial Sensitivity Tests; D009268:Nalidixic Acid / Q000031:analogs & derivatives* / Q000138:chemical synthesis
chemical_list: D000890:Anti-Infective Agents; D009268:Nalidixic Acid