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