Using COCCN1C(=O)CCC(N2C(=O)c3cccc([N+](=O)[O-])c3C2=O)C1=O to produce COCCN1C(=O)CCC(N2C(=O)c3cccc(N)c3C2=O)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.