Using COC(=O)C12CC3CC(CC(N)(C3)C1C(=O)[C@H](Cc1ccccc1)NC(=O)OC(C)(C)C)C2 to produce COC(=O)C12CC3CC(CC(N)(C3)C1C(=O)[C@@H](N)Cc1ccccc1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.