Using BrBr, CC(=O)OCc1csc(-c2cccc(C(F)(F)F)c2)n1 to produce CC(=O)OCc1nc(-c2cccc(C(F)(F)F)c2)sc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.