(E)-8-(3-Bromo-4,5-dimethoxystyryl)-7-methyl-1,3-dipropylxanthine 151539-56-9 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(3-bromo-4,5-dimethoxyphenyl)ethenyl)-1,3-dipropyl-7-methyl-, (E)-