[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][=Branch1][C][=C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid anion that is obtained by removal of a proton from the carboxylic acid group of methacrylic acid. It is functionally related to an acrylate. It is a conjugate base of a methacrylic acid."}]