Using CCOC(=O)C(=O)Nc1c([N+](=O)[O-])cc(C(C)=O)c2c1CCCC2 to produce CC(=O)c1cc2c([nH]c(=O)c(=O)n2O)c2c1CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.