Alloxantin76-24-4100 % similar 5,5-Dibromo-2,4,6(1H,3H,5H)-pyrimidinetrione511-67-156 % similar Barbituric acid67-52-738 % similar Phenobarbital50-06-638 % similar Amobarbital57-43-238 % similar (±)-Pentobarbital76-74-437 % similar 2,4,5,6(1H,3H)-Pyrimidinetetrone, hydrate (1:1)2244-11-334 % similar Violuric acid87-39-834 % similar 1,5,5-Trimethyl-2,4-imidazolidinedione6851-81-634 % similar Bis(trifluoroacetyl)imide407-24-933 % similar Dimethadione695-53-431 % similar 1-(Hydroxymethyl)-5,5-dimethylhydantoin116-25-631 % similar