Using O=C(CBr)Nc1ccc(Cl)cn1, CCOC(=O)c1cc(C(=O)OCC)[nH]n1 to produce CCOC(=O)c1cc(C(=O)OCC)n(CC(=O)Nc2ccc(Cl)cn2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.