(E)-1,3-Diethyl-7-methyl-8-(2-(3-nitrophenyl)ethenyl)-3,7-dihydro-1H-purine-2,6-dione (E)-1,3-Diethyl-7-methyl-8-(3-nitrostyryl)xanthine 155271-83-3 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-7-methyl-8-(2-(3-nitrophenyl)ethenyl)-, (E)-