Using CN(C)C(=O)Cc1nc2cc(Cl)ccc2c(=O)[nH]1, BrBr to produce CN(C)C(=O)C(Br)c1nc2cc(Cl)ccc2c(=O)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.