(E)-4-(1,2,3,6-Tetrahydro-3-isobutyl-2,6-dioxo-9H-purin-8-yl)cinnamic acid 106465-49-0 2-Propenoic acid, 3-(4-(2,3,6,7-tetrahydro-3-(2-methylpropyl)-2,6-dioxo-1H-purin-8-yl)phenyl)-, (E)-