Using OB(O)c1ccnc(F)c1, CCOC(=O)Cc1nc2ccc(Br)cc2s1 to produce CCOC(=O)Cc1nc2ccc(-c3ccnc(F)c3)cc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.