(E)-1,3-Diethyl-8-(2-(3-fluorophenyl)ethenyl)-7-methyl-3,7-dihydro-1H-purine-2,6-dione (E)-1,3-Diethyl-8-(3-fluorostyryl)-7-methylxanthine 155271-59-3 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(3-fluorophenyl)ethenyl)-7-methyl-, (E)-