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