(E)-8-(2,4-Dimethoxystyryl)caffeine (E)-8-(2-(2,4-Dimethoxyphenyl)ethenyl)-1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione 155271-21-9 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(2,4-dimethoxyphenyl)ethenyl)-1,3,7-trimethyl-, (E)-