Using COC(=O)[C@H](Cc1ccc(NC(=O)OC(C)(C)C)c(C)c1)NC(=O)OCc1ccccc1 to produce COC(=O)[C@H](Cc1ccc(N)c(C)c1)NC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.