Using CI, CC(C)(C)OC(=O)N1CCC[C@@H](N2CCNC2=O)C1 to produce CN1CCN([C@@H]2CCCN(C(=O)OC(C)(C)C)C2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.