(E)-8-(4-Methoxy-2,3-dimethylstyryl)-1,3-dipropylxanthine 151539-17-2 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dipropyl-8-(2-(4-methoxy-2,3-dimethylphenyl)ethenyl)-, (E)-