(E)-8-(2-(3-Bromo-4-methoxyphenyl)ethenyl)-1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione (E)-8-(3-Bromo-4-methoxystyryl)caffeine 155271-51-5 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(3-bromo-4-methoxyphenyl)ethenyl)-1,3,7-trimethyl-, (E)-