Using CCC1CCN(C(=O)OC(C)(C)C)[C@@H]1C(=O)OC to produce CC[C@@H]1CCN(C(=O)OC(C)(C)C)[C@@H]1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.