(E)-1,3-Diethyl-8-(3-methoxy-4,5-methylenedioxystyryl)xanthine 155271-99-1 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(7-methoxy-1,3-benzodioxol-5-yl)ethenyl)-, (E)-