(E)-8-(2-(4-Bromophenyl)ethenyl)-1,3-diethyl-7-methyl-3,7-dihydro-1H-purine-2,6-dione (E)-8-(4-Bromostyryl)-1,3-diethyl-7-methylxanthine 155271-71-9 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(4-bromophenyl)ethenyl)-1,3-diethyl-7-methyl-, (E)-