Using O=C([O-])[O-], O=C1Nc2ccc([N+](=O)[O-])cc2OC1(F)F to produce CN1C(=O)C(F)(F)Oc2cc([N+](=O)[O-])ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.