Using CCOC(=O)[C@H](CNC(=O)[C@@H]1CCCN(C(=O)OCc2ccccc2)C1)NC(=O)OC(C)(C)C to produce CCOC(=O)[C@@H](N)CN, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.