(E)-1,3-Diallyl-7-methyl-8-(3,4,5-trimethoxystyryl)xanthine 142665-36-9 1H-Purine-2,6-dione, 3,7-dihydro-1,3-di-2-propenyl-7-methyl-8-(2-(3,4,5-trimethoxyphenyl)ethenyl)-, (E)-