Using CCOC(=O)N1CCN(C(=O)[C@H](CCC(=O)OC(C)(C)C)NC(=O)OCc2ccccc2)CC1 to produce CCOC(=O)N1CCN(C(=O)[C@@H](N)CCC(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.