Using O=C1Nc2cccnc2Nc2ccccc21, O=C(CBr)c1ccccc1 to produce O=C(CN1C(=O)c2ccccc2Nc2ncccc21)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.