"Violuric acid" . . . . . "5-Isonitrosobarbituric acid" . . "5-Hydroxyiminobarbituric acid" . "2,4,5,6(1H,3H)-Pyrimidinetetrone 5-oxime" . . "Alloxan 5-oxime" . . "violuric acid" . "Violuric acid" . . . . . . . "6-Hydroxy-5-nitroso-1H-pyrimidine-2,4-dione" . . . . .