(E)-1,3-Diethyl-8-(4-hydroxy-2,3-dimethylstyryl)-7-methylxanthine 155272-15-4 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(2,3-dimethyl-4-hydroxyphenyl)ethenyl)-7-methyl, (E)-