[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a monohydroxybenzoic acid that is 4-hydroxybenzoic acid substituted by a methoxy group at position 3. It has a role as a plant metabolite. It is a monohydroxybenzoic acid and a methoxybenzoic acid. It is a conjugate acid of a vanillate."}, {"from": "gpt", "value": "[C][O][C][=C][Branch1][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][O]"}]