Using CCOC(=O)N1CCN(c2ccc([N+](=O)[O-])c(C=C3NC(=O)NC3=O)c2)CC1 to produce CCOC(=O)N1CCN(c2ccc3nc4[nH]c(=O)[nH]c4cc3c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.