2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5'-((2-hydroxyphenyl)methylene)bis-, disodium salt 5,5'-(o-Hydroxybenzylidene)dibarbituric acid disodium salt 66-57-9 Barbituric acid, 5,5'-salicylidenedi-, disodium salt Sodium 5-salicylidene-bis-barbiturate