Using O=[N+]([O-])c1ccc(O)cc1, CCn1ncc2c(oc3c(OC(F)F)ccc(C(=O)O)c32)c1=O to produce CCn1ncc2c(oc3c(OC(F)F)ccc(C(=O)Oc4ccc([N+](=O)[O-])cc4)c32)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.