Using Cc1onc(-c2ccccc2)c1-c1nnc2n1Cc1ccc(Br)cc1-2, O=BOc1ccncc1 to produce Cc1onc(-c2ccccc2)c1-c1nnc2n1Cc1ccc(-c3ccncc3)cc1-2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.