Using COc1nc(-c2ccccc2Cl)cc(NC(=O)c2c(Cl)c(C(C)(C)C)nn2C)c1[N+](=O)[O-] to produce COc1nc(-c2ccccc2Cl)cc(NC(=O)c2c(Cl)c(C(C)(C)C)nn2C)c1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.