4-nitro-6-oxohepta-2,4-dienedioate => 2-oxo-3-(5-oxofuran-2-ylidene)propanoate + nitrite
4-nitro-6-oxohepta-2,4-dienedioate => 2-oxo-3-(5-oxofuran-2-ylidene)propanoate + nitrite
4-nitro-6-oxohepta-2,4-dienedioate => 2-oxo-3-(5-oxofuran-2-ylidene)propanoate + nitrite
4-nitro-6-oxohepta-2,4-dienedioate => 2-oxo-3-(5-oxofuran-2-ylidene)propanoate + nitrite