Using CC(C)(C)OC(=O)n1c(-c2ccccc2)c(Br)c2cc(CN3CCS(=O)(=O)CC3)cc([N+](=O)[O-])c21 to produce O=[N+]([O-])c1cc(CN2CCS(=O)(=O)CC2)cc2c(Br)c(-c3ccccc3)[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.