5-Amino-2,4,6(1H,3H,5H)-pyrimidinetrione118-78-5100 % similar 5-Nitrobarbituric acid480-68-243 % similar 5-Methylhydantoin616-03-541 % similar Allantoin97-59-640 % similar 5-Isopropylhydantoin16935-34-538 % similar 5-Ethylhydantoin15414-82-137 % similar Dihydrothymine696-04-837 % similar Parabanic acid120-89-836 % similar Murexide3051-09-036 % similar Phenylhydantoin89-24-734 % similar 5-Hydantoinacetic acid5427-26-933 % similar 2-Aminopropanediamide62009-47-633 % similar 3-Amino-2,6-piperidinedione2353-44-832 % similar Alloxan50-71-532 % similar Barbituric acid67-52-732 % similar 5-(2-(Methylthio)ethyl)-2,4-imidazolidinedione13253-44-631 % similar 5-(4-Hydroxyphenyl)imidazolidine-2,4-dione2420-17-931 % similar 5-(Phenylmethyl)-2,4-imidazolidinedione3530-82-331 % similar 5-(4-Hydroxyphenyl)-2,4-imidazolidinedione54832-24-531 % similar Glycoluril496-46-830 % similar