Using Cc1c(F)cc([N+](=O)[O-])cc1C1(C(F)F)N=C(N)OC2CC21 to produce Cc1c(F)cc(N)cc1C1(C(F)F)N=C(N)OC2CC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.