Using O=C(c1ccc(OCC(F)(F)F)cc1)c1cc(Br)ccc1Cl, SCCS to produce FC(F)(F)COc1ccc(C2(c3cc(Br)ccc3Cl)SCCS2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.