Using Nc1cccc(Cl)c1, O=C(Cl)c1c(C(F)(F)F)nc2c(C(F)(F)F)cccc2c1O to produce O=C(Nc1cccc(Cl)c1)c1c(C(F)(F)F)nc2c(C(F)(F)F)cccc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.