Using O=c1[nH]c2nc(-c3nn(Cc4ccccc4F)c4ncc(F)cc34)nc(I)c2n1CC(F)(F)F to produce O=c1[nH]c2nc(-c3nn(Cc4ccccc4F)c4ncc(F)cc34)ncc2n1CC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.