SMILES: COC1=C(C=CC(=C1)S(=O)(=O)O)O
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 derives from a guaiacol. It is a conjugate acid of a 4-hydroxy-3-methoxybenzene-1-sulfonate.