Using O=[N+]([O-])c1c(F)cccc1F, CC(C)(C)OC(=O)CCl to produce CC(C)(C)OC(=O)Cc1cc(F)c([N+](=O)[O-])c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.