[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a fatty acid ethyl ester of 3-hexenoic acid. It has a role as a metabolite. It is functionally related to a 3-hexenoic acid."}, {"from": "gpt", "value": "[C][C][/C][=C][/C][C][=Branch1][C][=O][O][C][C]"}]