(E)-1,3-Diethyl-8-(2,4-dimethoxy-3-methylstyryl)-7-methylxanthine 155271-11-7 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(2,4-dimethoxy-3-methylphenyl)ethenyl)-7-methyl-, (E)-