Using COS(=O)(=O)OC, O=c1cc(C(F)(F)F)[nH]c(=O)n1-c1ccc(Cl)cc1[N+](=O)[O-] to produce Cn1c(C(F)(F)F)cc(=O)n(-c2ccc(Cl)cc2[N+](=O)[O-])c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.