Using CCCCn1c(=O)c2c(NC)n[nH]c2n(Cc2ccc([N+](=O)[O-])cc2)c1=O to produce CCCCn1c(=O)c2c(NC)n[nH]c2n(Cc2ccc(N)cc2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.