Using CSc1ncc(C=O)cn1, O=S(=O)(c1ccccc1)n1cc(I)c2cc(Cl)cnc21 to produce CSc1ncc(C(O)c2cn(S(=O)(=O)c3ccccc3)c3ncc(Cl)cc23)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.