Using Nc1c(F)cc(F)cc1F, COc1cccc2c(Cl)c(C#N)cnc12 to produce COc1cccc2c(Nc3c(F)cc(F)cc3F)c(C#N)cnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.