(E)-8-(2-Bromo-4,5-methylenedioxystyryl)-1,3-diethylxanthine 155271-88-8 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(6-bromo-1,3-benzodioxol-5-yl)ethenyl)-1,3-diethyl-, (E)-