Using Clc1cc(Cl)cc(OCCBr)c1, O=C1NC(=O)c2ccccc21 to produce O=C1c2ccccc2C(=O)N1CCOc1cc(Cl)cc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.