Using C=C(Cl)CCl, N#CC(C#N)Cc1ccc(SC(F)(F)F)cc1 to produce C=C(Cl)CC(C#N)(C#N)Cc1ccc(SC(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.