[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a dicarboxylic acid that is butenedioic acid in which the hydrogen at the 2-position is substituted by a hydroxy group. It is a dicarboxylic acid, a 2-hydroxy carboxylic acid, an enol, a C4-dicarboxylic acid and a dicarboxylic fatty acid. It is functionally related to a butenedioic acid. It is a conjugate base of an enol-oxaloacetate."}, {"from": "gpt", "value": "[C][=Branch1][#Branch2][=C][Branch1][=Branch1][/C][=Branch1][C][=O][O][\\O][\\C][=Branch1][C][=O][O]"}]