Using O=C(Nc1ccc([N+](=O)[O-])c(C(F)(F)F)c1)c1ccccc1 to produce Nc1ccc(NC(=O)c2ccccc2)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.