(E)-8-(2-(3-Bromophenyl)ethenyl)-1,3-diethyl-7-methyl-3,7-dihydro-1H-purine-2,6-dione (E)-8-(3-Bromostyryl)-1,3-diethyl-7-methylxanthine 155271-85-5 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(3-bromophenyl)ethenyl)-1,3-diethyl-7-methyl-, (E)-