Using CC(Nc1cc(-c2cc3nccn3c(N3CC4CC3CN4)n2)ccn1)c1ccccc1, CCBr to produce CCN1C[C@@H]2C[C@H]1CN2c1nc(-c2ccnc(N[C@@H](C)c3ccccc3)c2)cc2nccn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.