Using COC(=O)C(O)c1ccc(OCc2ccc(Cl)c(Cl)c2)cc1 to produce COC(=O)C(=O)c1ccc(OCc2ccc(Cl)c(Cl)c2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.