(E)-7-Methyl-1,3-dipropyl-8-(3,4,5-trimethoxystyryl)xanthine 141807-98-9 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dipropyl-7-methyl-8-(2-(3,4,5-trimethoxyphenyl)ethenyl)-,(E)-