97-59-6 InChI=1/C4H6N4O3/c5-3(10)6-1-2(9)8-4(11)7-1/h1H,(H3,5,6,10)(H2,7,8,9,11 N-(2,5-dioxoimidazolidin-4-yl)urea urea, N-(2,5-dioxo-4-imidazolidinyl)-