Using COC(=O)CCCBr, COC(=O)c1cc(Br)c(Cl)cc1NC(=O)OC(C)C to produce COC(=O)CCCN(C(=O)OC(C)C)c1cc(Cl)c(Br)cc1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.