Using [I-], COC(=O)c1c(C(F)F)nc(C(F)(F)F)c(CCl)c1CC(C)C to produce COC(=O)c1c(C(F)F)nc(C(F)(F)F)c(CI)c1CC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.