Using CCCCN(C(=O)C(=O)OCC)c1c([N+](=O)[O-])ccc2c1CCCN2 to produce CCCCn1c(=O)c(=O)[nH]c2ccc3c(c21)CCCN3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.