Using Clc1nc(Cl)nc(Cl)n1, CC(C)(C)C(C)(C)N to produce CC(C)(C)C(C)(C)Nc1nc(Cl)nc(NC(C)(C)C(C)(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.