[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a fatty acid methyl ester. It is functionally related to a 2-butenoic acid."}, {"from": "gpt", "value": "[C][/C][=Branch1][Branch2][=C][\\C][=Branch1][C][=O][O][C][/O]"}]