(E)-1,3-Diethyl-7-methyl-8-(2,3,4-trimethoxystyryl)xanthine 155271-05-9 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-7-methyl-8-(2-(2,3,4-trimethoxyphenyl)ethenyl)-,(E)-