Using O=c1c2ccccc2nc(-c2cncc(Br)c2)n1-c1ccc(Cl)cc1, OB(O)c1ccccc1 to produce O=c1c2ccccc2nc(-c2cncc(-c3ccccc3)c2)n1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.