(E)-8-(2,4-Dimethoxy-3-methylstyryl)-7-methyl-1,3-dipropylxanthine 151539-21-8 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(2,4-dimethoxy-3-methylphenyl)ethenyl)-1,3-dipropyl-7-methyl-, (E)-