Using CN1C(=O)C2(CC(c3ccccc3)Oc3ccc(Br)cc32)N=C1N, OB(O)c1ccccc1 to produce CN1C(=O)C2(CC(c3ccccc3)Oc3ccc(-c4ccccc4)cc32)N=C1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.