[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][Branch1][=Branch1][C][=Branch1][C][=O][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a 3-oxo monocarboxylic acid that is acetoacetic acid which is substituted at position 2 by a methyl group. It is functionally related to a butyric acid and an acetoacetic acid. It is a conjugate acid of a 2-methylacetoacetate."}]