Using CSc1nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)c(N)c1C#N to produce CSc1nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)cc1C#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.