Using COC(=O)c1ccc([C@H](C)NC(=O)[C@H]2Cc3ccccc3CN2C(=O)OC(C)(C)C)cc1 to produce COC(=O)c1ccc([C@H](C)NC(=O)[C@H]2Cc3ccccc3CN2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.