Using [I-], CS(=O)(=O)OCC1(CC#Cc2ccc(OC(F)(F)F)cc2)CCC1 to produce FC(F)(F)Oc1ccc(C#CCC2(CI)CCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.