Using O=C(Cl)c1cc(Br)ccc1Cl, Fc1ccc(-c2cccs2)cc1 to produce O=C(c1ccc(-c2ccc(F)cc2)s1)c1cc(Br)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.