. . "Nalidixin"@en . . "D009268" . . "1,8-Naphthyridine-3-carboxylic acid, 1-ethyl-1,4-dihydro-7-methyl-4-oxo-"@en . "C0027353" . . . "Nalidixic Acid"@en . . "Nalidixic Acid"@en .