1,7-Dioxo-8-(4'-nitrophenyl)-1,3,5,7-tetrahydrodifuro(3,4-b:3',4'-e)pyridine 120260-24-4 1H,3H-Difuro(3,4-b:3',4'-e)pyridine-1,7(5H)-dione, 8-(4-nitrophenyl)- 8-(4-Nitrophenyl)-1H,3H-difuro(3,4-b:3',4'-e)pyridine-1,7(5H)-dione BRN 3566162