Using OB(O)c1ccncc1, CC(C)(C)OC(=O)NCC1CCN(c2nc(Cl)ncc2Br)CC1 to produce CC(C)(C)OC(=O)NCC1CCN(c2nc(Cl)ncc2-c2ccncc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.