(E)-1,3-Diethyl-8-(2-(4-hydroxyphenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione (E)-1,3-Diethyl-8-(4-hydroxystyryl)xanthine 155272-14-3 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(4-hydroxyphenyl)ethenyl)-, (E)-