Using CC(C)(C)OC(=O)N1CCN(C(=O)CCl)[C@@H](CO)C1 to produce CC(C)(C)OC(=O)N1CCN2C(=O)COC[C@H]2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.