[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=Branch1][O][=C][/C][=Branch1][C][=O][C][=Branch1][C][=O][O][\\C][=C][/O-1]"}, {"from": "gpt", "value": "The molecule is the conjugate base of 2-hydroxy-6-oxohexa-2,4-dienoic acid; major species at pH 7.3. It is a 6-oxo monocarboxylic acid anion and a hydroxy monocarboxylic acid anion. It is a conjugate base of a 2-hydroxy-6-oxohexa-2,4-dienoic acid."}]