2,4,5,6(1H,3H)-Pyrimidinetetrone hydrate 2,4,5,6(1H,3H)-Pyrimidinetetrone, monohydrate 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5-dihydroxy- 3237-50-1 Alloxan monohydrate Barbituric acid, 5,5-dihydroxy- Mesoxalylcarbamide monohydrate Mesoxalylurea monohydrate NSC221304