Using CCOC(=O)n1nc(NC(=O)c2ccccc2[N+](=O)[O-])c2cc(C(=O)OC(C)(C)C)sc21 to produce CCOC(=O)n1nc(NC(=O)c2ccccc2N)c2cc(C(=O)OC(C)(C)C)sc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.