1-(2,4-Diketo-1,3-dimethyl-1,2,3,4-tetrahydropyrimidin-6-yl)-3-isobutylurea 1-Isobutyl-3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-4-pyrimidinyl)urea 31683-79-1 Urea, 1-isobutyl-3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-4-pyrimidinyl)-