Using O=S(=O)([O-])c1ccc(Br)c2ccccc12, O=[N+]([O-])O to produce O=[N+]([O-])c1cccc2c(Br)ccc(S(=O)(=O)O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.