Using O=C(Nc1ccc(CN2C(=O)[C@H]3CCC[C@H]3Nc3ccccc32)cc1)OCc1ccccc1, O=C(Br)CBr to produce O=C(Nc1ccc(CN2C(=O)[C@H]3CCC[C@H]3N(C(=O)CBr)c3ccccc32)cc1)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.