Using CCN(CC)c1cccc2nc(C(=O)c3ccc(Cl)cc3Cl)n(CCCO)c12, BrC(Br)(Br)Br to produce CCN(CC)c1cccc2nc(C(=O)c3ccc(Cl)cc3Cl)n(CCCBr)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.