Using Nc1ccccc1Nc1ccccc1, O=C(CBr)N1CCCCc2ccccc21 to produce O=C(CNc1ccccc1Nc1ccccc1)N1CCCCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.