Using COc1ccc2[nH]c(C(=O)N(C)OC)c([N+](=O)[O-])c2c1 to produce COc1ccc2[nH]c(C(=O)N(C)OC)c(N)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.