Using O=C(O)c1cn(-c2cc([N+](=O)[O-])c(F)cc2F)c2cc(F)c(F)cc2c1=O, CC(Cl)Cl to produce CCOC(=O)c1cn(-c2cc([N+](=O)[O-])c(F)cc2F)c2cc(F)c(F)cc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.