Using O=S(=O)(c1ccccc1)N(F)S(=O)(=O)c1ccccc1, Cc1c(Br)c(-c2ccccc2)cn1C to produce Cc1c(F)c(-c2ccccc2)cn1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.