Using COc1cc2nccc(Oc3cc4ccccc4nc3Br)c2cc1OC, OB(O)c1cccnc1 to produce COc1cc2nccc(Oc3cc4ccccc4nc3-c3cccnc3)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.