Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, OCc1cc(I)c(O)c(Cl)n1 to produce OCc1cc(I)c(OCC(F)(F)F)c(Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.