Using C=CCN1C(=O)[C@@H](NC(=O)C(C)(C)C(=O)OCC)[C@@H](C)Oc2ccc(F)cc21 to produce C=CCN1C(=O)[C@@H](NC(=O)C(C)(C)C(=O)O)[C@@H](C)Oc2ccc(F)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.