(E)-8-(2-(1,4-Benzodioxan-6-yl)vinyl)-1,3-dipropylxanthine 151539-58-1 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(2,3-dihydro-1,4-benzodioxin-6-yl)ethenyl)-1,3-dipropyl-, (E)-