Using CSc1ncc2ccc(Br)n2n1, OB(O)c1cccc2c1OC(F)(F)O2 to produce CSc1ncc2ccc(-c3cccc4c3OC(F)(F)O4)n2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.