(E)-8-(2-Bromo-4,5-methylenedioxystyryl)-1,3-diethyl-7-methylxanthine 155271-89-9 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(6-bromo-1,3-benzodioxol-5-yl)ethenyl)-1,3-diethyl-7-methyl-, (E)-