1,3-Dihydro-2H-imidazo(4,5-b)pyridin-2-one monosodium salt 2-Oxoimidazo(4,5-b)pyridine sodium salt 2H-Imidazo(4,5-b)pyridin-2-one, 1,3-dihydro-, monosodium salt 85930-14-9