Using CC(C)n1cc(-c2cc(Br)cnc2N)nn1, OB(O)c1cccc(CN2CCOCC2)c1 to produce CC(C)n1cc(-c2cc(-c3cccc(CN4CCOCC4)c3)cnc2N)nn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.