Using [N-]=[N+]=[N-], O=C1CC2(CCN(C(=O)C(F)(F)F)CC2)c2ccccc21 to produce O=C1CC2(CCN(C(=O)C(F)(F)F)CC2)c2ccccc2N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.