(E)-1,3-Diethyl-7-methyl-8-(3,4,5-trimethoxystyryl)xanthine 147700-40-1 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-7-methyl-8-(2-(3,4,5-trimethoxyphenyl)ethenyl)-,(E)-