Using COc1ccc(Cn2nnc(C(=O)c3ccccc3[N+](=O)[O-])c2C(=O)[O-])cc1 to produce COc1ccc(Cn2nnc(C(=O)c3ccccc3[N+](=O)[O-])c2C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.