Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, O=Cc1[nH]nc(-c2cccs2)c1Br to produce O=Cc1c(Br)c(-c2cccs2)nn1CC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.