Using COC(=O)C1=Cc2cc(OCc3ccc(Cl)cc3)ccc2S(=O)(=O)CC1 to produce O=C(O)C1=Cc2cc(OCc3ccc(Cl)cc3)ccc2S(=O)(=O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.