(E)-8-(3,5-Bis(trifluoromethyl)styryl)-1,3-diethylxanthine 155271-78-6 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(3,5-bis(trifluoromethyl)phenyl)ethenyl)-1,3-diethyl-, (E)-