[{"from": "human", "value": "What can you tell me about this molecule? [C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][C][=O]"}, {"from": "gpt", "value": "The molecule is the conjugate base of 4,5-dioxopentanoic acid; major species at pH 7.3. It is a conjugate base of a 4,5-dioxopentanoic acid."}]