(E)-1,3-Dipropyl-8-(2-(3-nitrophenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione (E)-8-(3-Nitrostyryl)-1,3-dipropylxanthine 151539-32-1 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dipropyl-8-(2-(3-nitrophenyl)ethenyl)-, (E)-