[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][O][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][C][=O]"}, {"from": "gpt", "value": "The molecule is the conjugate base of 2,5-dioxopentanoic acid; major species at pH 7.3. It is a conjugate base of a 2,5-dioxopentanoic acid."}]