Using [Br-], O=c1c(Br)c(OS(=O)(=O)C(F)(F)F)ccn1Cc1cccc(F)c1 to produce O=c1c(Br)c(Br)ccn1Cc1cccc(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.