Using COC(=O)C(C(=O)OC)c1cc(Cl)c(Br)cc1C(=O)N(C)c1ccccc1OC to produce COc1ccccc1N(C)C(=O)c1cc(Br)c(Cl)cc1CC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.