Using CCOCCOc1ccc([N+](=O)[O-])c(C=C2NC(=O)NC2=O)c1 to produce CCOCCOc1ccc2nc3[nH]c(=O)[nH]c3cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.