Using CC1CC(c2ncc3nccc-3[nH]2)CC(c2ccccc2)N1, BrBr to produce CC1CC(c2ncc3ncc(Br)c-3[nH]2)CC(c2ccccc2)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.