(E)-4-(3-Butyl-1,2,3,6-tetrahydro-1-methyl-2,6-dioxo-9H-purin-8-yl)cinnamic acid 106465-56-9 2-Propenoic acid, 3-(4-(3-butyl-2,3,6,7-tetrahydro-1-methyl-2,6-dioxo-1H-purin-8-yl)phenyl)-,(E)-