Using C[Si](Cn1cncn1)(c1ccc(F)cc1)c1ccc(F)cc1, CSSC to produce CSc1ncnn1C[Si](C)(c1ccc(F)cc1)c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.