Using CS(=O)(=O)Cl, On1c(C(F)(F)F)nc2ncc(Cl)cc21 to produce CS(=O)(=O)On1c(C(F)(F)F)nc2ncc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.