2,4(1H,3H)-Pyrimidinedione, 5-diazo- 2,4-Diossi-5-diazopirimidina 2,6-Dioxo-5-diazopyrimidine 2435-76-9 5-Diazopyrimidine-2,4(3H)-dione 5-Diazouracil Diazouracil NSC 23519 NSC23519 Uracil, 5-diazo- WLN: T6MVMVJ ENUM [1,2,3]Oxadiazolo[5,4-d]pyrimidin-5(4H)-one