[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a dicarboxylic acid monoester obtained by the formal condensation of one of the carboxy groups of malonic acid with benzyl alcohol. It has a role as a human urinary metabolite. It is a dicarboxylic acid monoester and a benzyl ester. It is functionally related to a malonic acid and a benzyl alcohol."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][O][C][=Branch1][C][=O][C][C][=Branch1][C][=O][O]"}]