[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an octanoate ester obtained by the formal condensation of the carboxy group of octanoic acid with the hydroxy group of butanol. It has a role as a metabolite. It is functionally related to a butan-1-ol."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][=Branch1][C][=O][O][C][C][C][C]"}]