(E)-1,3-Diethyl-8-(2-(3,4-difluorophenyl)ethenyl)-7-methyl-3,7-dihydro-1H-purine-2,6-dione (E)-8-(3,4-Difluorostyryl)-1,3-diethyl-7-methylxanthine 155271-47-9 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(3,4-difluorophenyl)ethenyl)-7-methyl-, (E)-