Using CNC(=O)[C@@H](Cc1ccccc1)N(C)C(=O)[C@@H](Cc1ccc(-c2ccccc2)cc1)N(C)C(=O)OC(C)(C)C to produce CNC(=O)[C@@H](Cc1ccccc1)N(C)C(=O)[C@@H](Cc1ccc(-c2ccccc2)cc1)NC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.