(E)-1,3-Diethyl-8-(4-methoxy-2,3-dimethylstyryl)xanthine 155271-06-0 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(2,3-dimethyl-4-methoxy)phenyl)ethenyl)-, (E)-