Allantoin97-59-6100 % similar Allantoic acid99-16-145 % similar 5-Methylhydantoin616-03-542 % similar 5-Amino-2,4,6(1H,3H,5H)-pyrimidinetrione118-78-540 % similar 5-Isopropylhydantoin16935-34-539 % similar Biuret108-19-038 % similar 5-Ethylhydantoin15414-82-138 % similar Cyclohexylurea698-90-836 % similar Phenylhydantoin89-24-736 % similar Bromisoval496-67-335 % similar 5-Hydantoinacetic acid5427-26-935 % similar Biurea110-21-433 % similar 5-(2-(Methylthio)ethyl)-2,4-imidazolidinedione13253-44-633 % similar 5-(4-Hydroxyphenyl)imidazolidine-2,4-dione2420-17-933 % similar 5-(Phenylmethyl)-2,4-imidazolidinedione3530-82-333 % similar 5-(4-Hydroxyphenyl)-2,4-imidazolidinedione54832-24-533 % similar 5-Nitrobarbituric acid480-68-231 % similar Acetylurea591-07-131 % similar Semicarbazide57-56-731 % similar Dihydrothymine696-04-831 % similar