[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a methoxycinnamic acid having a single methoxy substituent at the 4-position on the phenyl ring. It is functionally related to a cinnamic acid."}, {"from": "gpt", "value": "[C][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][/C][=C][/C][=Branch1][C][=O][O]"}]