(E)-1,3-Diethyl-8-(2-(4-hydroxyphenyl)ethenyl)-7-methyl-3,7-dihydro-1H-purine-2,6-dione (E)-1,3-Diethyl-8-(4-hydroxystyryl)-7-methylxanthine 155272-05-2 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(4-hydroxyphenyl)ethenyl)-7-methyl-, (E)-