Using COC(=O)[C@@H](NC(=O)[C@H](CC(C)C)N(CC1OC(C)(C)N(C(=O)OC(C)(C)C)[C@H]1CC(C)C)C(=O)OCc1ccccc1)C(C)C to produce COC(=O)[C@@H](NC(=O)[C@H](CC(C)C)N(CC(O)[C@@H](N)CC(C)C)C(=O)OCc1ccccc1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.