Using CCOC(=O)[C@@H]1CC(S(=O)(=O)c2ccccc2Cl)C[C@H]1COc1ccc(Cl)cc1 to produce O=C(O)[C@@H]1CC(S(=O)(=O)c2ccccc2Cl)C[C@H]1COc1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.