Using NCC12CC3CC(CC(C3)C1)C2, Nc1nc(N)c2nc(CBr)cnc2n1 to produce Nc1nc(N)c2nc(CNCC34CC5CC(CC(C5)C3)C4)cnc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.