(E)-8-(2,3,4-Trimethoxystyryl)caffeine (E)-8-(2-(2,3,4-Trimethoxyphenyl)ethenyl)-1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione 147700-33-2 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(2,3,4-trimethoxyphenyl)ethenyl)-1,3,7-trimethyl-, (E)-