Using CCOC(=O)C(=O)Nc1cc2[nH]c(=O)c(=O)n(CC)c2cc1[N+](=O)[O-] to produce CCn1c(=O)c(=O)[nH]c2cc(N)c([N+](=O)[O-])cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.