Using c1cncc(B2OCCCO2)c1, O=[N+]([O-])c1ccc(Cl)c(Br)c1 to produce O=[N+]([O-])c1ccc(Cl)c(-c2cccnc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.