Using CN, CC(C)(C)OC(=O)N1CCC(C=O)(c2ccc(Cl)cc2)CC1 to produce CNCC1(c2ccc(Cl)cc2)CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.