Using [N-]=[N+]=[N-], CCOC(=O)C(Br)[C@@H](C)C(F)(F)F to produce CCOC(=O)C(N=[N+]=[N-])[C@@H](C)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.