Using Cc1cncc(Cl)n1, CN(C(=O)OC(C)(C)C)C1CCNCC1 to produce Cc1cncc(N2CCC(N(C)C(=O)OC(C)(C)C)CC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.