(E)-1,3-Diethyl-8-(2,3,4-trimethoxystyryl)xanthine (E)-1,3-Diethyl-8-(2-(2,3,4-trimethoxyphenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione 155271-04-8 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(2,3,4-trimethoxyphenyl)ethenyl)-, (E)-