Using O=C(O)Cc1ccc(F)cc1Sc1ccc([N+](=O)[O-])cc1 to produce O=C1Cc2ccc(F)cc2Sc2ccc([N+](=O)[O-])cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.