Using Clc1ncnc(Cl)n1, CC(C)(C)OC(=O)N1CC2CNCC2C1 to produce CC(C)(C)OC(=O)N1CC2CN(c3ncnc(Cl)n3)CC2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.