Using C[C@@H]1COCCN1c1nc(Cl)nc2[nH]c(Br)nc12, OB(O)c1cccc2[nH]ccc12 to produce C[C@@H]1COCCN1c1nc(Cl)nc2[nH]c(-c3cccc4[nH]ccc34)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.