[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an acetate ester obtained by the formal condensation of the two hydroxy groups of propane-1,3-diol with acetic acid. It has a role as a metabolite. It is a diester and an acetate ester. It is functionally related to a propane-1,3-diol."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O][C][C][C][O][C][=Branch1][C][=O][C]"}]