2-Propenoic acid, 3-(1,2,3,4-tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinyl)-, (E)- 28277-67-0 3-(2,4-Dioxo-6-methyl-5-pyrimidinyl)acrylic acid Uca-1,2,3,4-tetrahydro