Using O=C1Nc2cc(Cl)ccc2C1(Br)Cc1cccc(Cl)c1, NC(=O)CNc1ccccc1 to produce NC(=O)CN(c1ccccc1)C1(Cc2cccc(Cl)c2)C(=O)Nc2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.