[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a fatty acid ethyl ester obtained by the formal condensation of 2-methylbutyric acid with ethanol. It is a constituent of the aroma of wines, strawberries, blueberries, and apples. It has a role as a flavouring agent, a plant metabolite, a human metabolite and a fragrance. It is a volatile organic compound and a fatty acid ethyl ester. It is functionally related to an ethanol and a 2-methylbutyric acid."}, {"from": "gpt", "value": "[C][C][C][Branch1][C][C][C][=Branch1][C][=O][O][C][C]"}]