(E)-8-(2-(4-Butoxyphenyl)ethenyl)-1,3-dipropyl-3,7-dihydro-1H-purine-2,6-dione (E)-8-(4-Butoxystyryl)-1,3-dipropylxanthine 151539-68-3 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(4-butoxyphenyl)ethenyl)-1,3-dipropyl-, (E)-