Using COC(=O)[C@@H]1[C@H](OC)CCN1C(=O)OC(C)(C)C to produce CO[C@@H]1CCN(C(=O)OC(C)(C)C)[C@@H]1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.