(E)-1,3-Diethyl-7-methyl-8-(3-trifluoromethoxystyryl)xanthine 155271-73-1 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-7-methyl-8-(2-(3-(trifluoromethoxy)phenyl)ethenyl)-, (E)-