(E)-1,3-Diethyl-8-(4-methoxy-2,5-dimethylstyryl)-7-methylxanthine 155271-09-3 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(2,5-dimethyl-4-methoxy)phenyl)ethenyl)-7-methyl-, (E)-