Using [N-]=[N+]=[N-], O=C(CC(C(=O)CBr)C(F)(F)F)OCc1ccccc1 to produce [N-]=[N+]=NCC(=O)C(CC(=O)OCc1ccccc1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.