Using O=S([O-])[O-], BrCCCCCCCc1ccc(OCc2ccccc2)cc1 to produce O=S(=O)([O-])CCCCCCCc1ccc(OCc2ccccc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.