2,4,6-Trihydroxypyrimidine2,4,6-PyrimidinetrionePyrimidinetrioe2,4,6-Trihydroxy-1,3-diazineN,N′-MalonylureeBarbituric acid2,4,6(1H,3H,5H)-Pyrimidinetrione2,4,6-Trioxohexahydropyrimidine2,4,6-Trioxypyrimidine6-Hydroxyuracie2,4,6-PyrimidinetrioeMalonyluree6-Hydroxy-HydrouracieN,N′-(1,3-dioxo-1,3-propanediyl)urea