1-Butyl-3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-4-pyrimidinyl)-2-thiourea 1-Butyl-3-(2,4-diketo-1,3-dimethyl-1,2,3,4-tetrahydropyrimidin-6-yl)-2-thiourea 31652-57-0 Uracil, 1,3-dimethyl-5-(butylthiourea)- Urea, 1-butyl-3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-4-pyrimidinyl)-2-thio-