Using COC(=O)c1cc(Br)c(COC(=O)Nc2c(Cl)cccc2Cl)c(Br)c1 to produce COC(=O)c1cc(Br)c2c(c1)N(c1c(Cl)cccc1Cl)C(=O)OC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.