(E)-8-(2-(4-Butoxyphenyl)ethenyl)-1,3-diethyl-3,7-dihydro-1H-purine-2,6-dione (E)-8-(4-Butoxystyryl)-1,3-diethylxanthine 155271-34-4 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(4-butoxyphenyl)ethenyl)-1,3-diethyl-, (E)-