1,1,3,3-tetracyano-2-(5-nitro-2-furyl)prop-2-en-1-ide 1-propene-1,1,3,3-tetracarbonitrilato, 2-(5-nitro-2-furanyl)-, ion(1-) InChI=1/C11H2N5O3/c12-3-7(4-13)11(8(5-14)6-15)9-1-2-10(19-9)16(17)18/h1-2H/q-