Using Brc1sc2cc(OCc3ccccc3)ccc2c1Br, O=C(O)C(F)(F)F to produce O=S1C(Br)=C(Br)c2ccc(OCc3ccccc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.