(E)-1,3-Diethyl-7-methyl-8-(4-trifluoromethylstyryl)xanthine 155271-67-3 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-7-methyl-8-(2-(4-trifluoromethylphenyl)ethenyl)-,(E)-