(E)-8-(2-(4-Methoxynaphthyl)vinyl)-7-methyl-1,3-dipropylxanthine 151539-65-0 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dipropyl-8-(2-(4-methoxy-1-naphthalenyl)ethenyl)-7-methyl-, (E)-