Using O=C([O-])O, COc1ccc(C[C@H](NC(=O)OC(C)(C)C)C(=O)O)cc1 to produce COC(=O)[C@@H](N)Cc1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.