Using BrCCCCCCCc1ccccc1OCc1ccccc1, O=S([O-])[O-] to produce O=S(=O)([O-])CCCCCCCc1ccccc1OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.