Using Fc1cc(Br)cc(F)c1Cc1cccc(Br)n1, OB(O)c1ccc(F)cc1F to produce Fc1ccc(-c2cccc(Cc3c(F)cc(Br)cc3F)n2)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.