2(1H)-Quinolinone, 4-hydroxy-, monosodium salt 2,4-Dihydroxyquinoline, monosodium salt 4-Hydroxy-2-quinolone, monosodium salt 4510-76-3 Carbostyril, 4-hydroxy-, monosodium salt (8CI) EINECS 224-828-9 NSC 89729