Using COC(=O)c1cn(-c2cc(C(=O)OC)c([N+](=O)[O-])cc2C(F)(F)F)cn1 to produce COC(=O)c1cn(-c2cc(C(=O)OC)c(N)cc2C(F)(F)F)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.