Using COC(=O)[C@H](Cc1ccccc1)NC(=O)[C@H](NC(=O)OC(C)(C)C)c1ccccc1 to produce COC(=O)[C@H](Cc1ccccc1)NC(=O)[C@H](N)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.