Using CC(=Cc1ccccc1)C1=CCC(OC(F)(F)C(F)(F)Br)(OC(F)(F)C(F)(F)Br)C=C1 to produce CC(=Cc1ccc(OC(F)=C(F)F)cc1)c1ccc(OC(F)=C(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.