Using CC1(C)OB(c2c(F)cccc2F)OC1(C)C, COC(=O)c1ccc(F)c(Br)n1 to produce COC(=O)c1ccc(F)c(-c2c(F)cccc2F)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.