[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a dicarboxylic acid monoanion and a hydroxymalonate. It is functionally related to a malonate(1-). It is a conjugate base of a hydroxymalonic acid. It is a conjugate acid of a hydroxymalonate(2-)."}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][=Branch1][C][=O][O][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O]"}]