Using CN1CCC(=O)CC1, Nc1ncc(Br)nc1C(=O)Nc1cnccc1N1CCCC(N)C1 to produce CN1CCC(NC2CCCN(c3ccncc3NC(=O)c3nc(Br)cnc3N)C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.