144104-68-7 2,4(1H,3H)-Pyrimidinedione 2,4-Dihydroxypyrimidine 2,4-Dioxopyrimidine 2,4-Pyrimidinediol 2,4-Pyrimidinedione 42910-77-0 4433-21-0 4433-24-3 66-22-8 766-19-8 AI3-25470 BMS 205603-01 CCRIS 3077 EINECS 200-621-9 Hybar X NSC 3970 Pirod Pyrod RU 12709 SQ 6201 SQ 7726 SQ 8493 URACIL Ura Uracil [USAN]