[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an arenesulfonic acid that is guaiacol sulfated at position 4. Commonly used (in the form of its potassium salt) as an expectorant. It has a role as an expectorant. It is an arenesulfonic acid and a member of guaiacols. It is functionally related to a guaiacol. It is a conjugate acid of a 4-hydroxy-3-methoxybenzene-1-sulfonate."}, {"from": "gpt", "value": "[C][O][C][=C][Branch1][P][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O][O]"}]