Using COC(=O)c1cc(-c2cc(Cl)c(OCc3ccc(OC)cc3)c(Cl)c2)n[nH]1 to produce COc1ccc(COc2c(Cl)cc(-c3cc(C(=O)O)[nH]n3)cc2Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.