has role nalidixic acid 1-Ethyl-7-methyl-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid chebi_ontology 1-ethyl-1,4-dihydro-7-methyl-4-oxo-1,8-naphthyridine-3-carboxylic acid 1,4-dihydro-1-ethyl-7-methyl-4-oxo-1,8-naphthyridine-3-carboxylic acid 1-Aethyl-7-methyl-1,8-naphthyridin-4-on-3-karbonsaeure 1-ethyl-7-methyl-1,4-dihydro-1,8-naphthyridin-4-one-3-carboxylic acid CHEBI:7456 NALIDIXIC ACID Nalidixic acid A monocarboxylic acid comprising 1,8-naphthyridin-4-one substituted by carboxylic acid, ethyl and methyl groups at positions 3, 1, and 7, respectively. An orally administered antibacterial, it is used in the treatment of lower urinary-tract infections due to Gram-negative bacteria, including the majority of <em>E. coli</em>, <em>Enterobacter</em>, <em>Klebsiella</em>, and <em>Proteus</em> species. CHEBI:100147 3-carboxy-1-ethyl-7-methyl-1,8-naphthyridin-4-one monocarboxylic acid antibacterial drug DNA synthesis inhibitor nalidixic acid anion 1,8-naphthyridine derivative quinolone antibiotic