[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a methylbenzoic acid in which the methyl substituent is located at position 4. It is a conjugate acid of a p-toluate."}, {"from": "gpt", "value": "[C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O]"}]