1-Aminohydantoin hydrochloride2827-56-7100 % similar 1-Aminohydantoin6301-02-688 % similar 1-Methylhydantoin616-04-648 % similar Creatinine hydrochloride19230-81-041 % similar 1-(Phenylmethyl)-2,4-imidazolidinedione6777-05-539 % similar 1-Methyl-2,4,6(1H,3H,5H)-pyrimidinetrione2565-47-137 % similar Cardioxane149003-01-035 % similar Barbituric acid67-52-734 % similar Dimethylglycine hydrochloride2491-06-734 % similar Carboxymethoxylamine hemihydrochloride2921-14-434 % similar Glycylglycine hydrochloride13059-60-433 % similar