(E)-1,3-Dimethyl-8-(2-(2,3,4-trimethoxyphenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione (E)-8-(2,3,4-Trimethoxystyryl)theophylline 147700-32-1 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-8-(2-(2,3,4-trimethoxyphenyl)ethenyl)-, (E)-