2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5-diphenyl- (9CI) 21914-07-8 5,5-Diphenyl-2,4,6(1H,3H,5H)-pyrimidinetrione 5,5-Diphenylbarbituric acid 64038-07-9 Barbituric acid, 5,5-diphenyl- NSC 80540