(E)-1,3-Diethyl-8-(2-(3-phenoxyphenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione (E)-1,3-Diethyl-8-(3-phenoxystyryl)xanthine 155814-35-0 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(3-phenoxyphenyl)ethenyl)-, (E)-