Using FC(F)(F)I, Cn1ncnc1COc1nn2c(-c3ccccc3F)nnc2cc1Br to produce Cn1ncnc1COc1nn2c(-c3ccccc3F)nnc2cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.