Using OB(O)c1ccccc1C(F)(F)F, Cc1nc(Cl)c([N+](=O)[O-])c(Cl)n1 to produce Cc1nc(Cl)c([N+](=O)[O-])c(-c2ccccc2C(F)(F)F)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.