Using COc1cc(NC(=O)C(C)C)c(C2(O)C(=O)c3cccc([N+](=O)[O-])c3C2=O)cc1OC to produce COc1cc(NC(=O)C(C)C)c(C2(O)C(=O)c3cccc(N)c3C2=O)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.