Using Nc1nc(NC2CCCCC2)nc2c1ncn2Cc1ccccc1, BrBr to produce Nc1nc(NC2CCCCC2)nc2c1nc(Br)n2Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.