(E)-3-(4-(2,3,6,7-Tetrahydro-1,3-dimethyl-2,6-dioxo-1H-purin-8-yl)phenyl)-2-propenoic acid (E)-4-(1,2,3,6-Tetrahydro-1,3-dimethyl-2,6-dioxo-9H-purin-8-yl)cinnamic acid 106465-41-2 2-Propenoic acid, 3-(4-(2,3,6,7-tetrahydro-1,3-dimethyl-2,6-dioxo-1H-purin-8-yl)phenyl)-, (E)-