Using COc1ccc2cc(Br)ccc2c1, O=C1CCC(C(F)(F)F)CC1 to produce COc1ccc2cc(C3(O)CCC(C(F)(F)F)CC3)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.