2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbonitrile 5-pyrimidinecarbonitrile, 1,2,3,4-tetrahydro-2,4-dioxo- InChI=1/C5H3N3O2/c6-1-3-2-7-5(10)8-4(3)9/h2H,(H2,7,8,9,10