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