Using CCOC(=O)CN(CCOC)C(=O)[C@H](CCCNC(=N)N)N[N+](=O)[O-] to produce CCOC(=O)CN(CCOC)C(=O)[C@@H](N)CCCNC(=N)N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.