Using Cn1c(C(F)(F)F)cc(=O)n(-c2cc(F)c([N+](=O)[O-])cc2F)c1=O, COc1cccc(O)c1 to produce COc1cccc(Oc2cc(-n3c(=O)cc(C(F)(F)F)n(C)c3=O)c(F)cc2[N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.