Using OB(O)c1ccncc1, COc1ccc(C(=O)C(=O)c2cccc(Br)c2)cc1C to produce COc1ccc(C(=O)C(=O)c2cccc(-c3ccncc3)c2)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.