Using OB(O)c1ccccc1C(F)(F)F, O=Cc1cc2c(Cl)cccc2nc1Cl to produce O=Cc1cc2c(Cl)cccc2nc1-c1ccccc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.