[{"from": "human", "value": "Describe this molecule. [C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid that is malonic acid in which one of the methylene hydrogens is substituted by a methyl group. It has a role as a human metabolite. It is functionally related to a malonic acid. It is a conjugate acid of a methylmalonate(1-)."}]