Using CCO, O=C(O)COc1ccc(C(=O)c2ccc(O)cc2)c(Cl)c1Cl to produce CCOC(=O)COc1ccc(C(=O)c2ccc(O)cc2)c(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.