Using COCC(=O)N(c1c(C)cccc1[N+](=O)[O-])C(C)C(=O)OC to produce COCC(=O)N(c1c(C)cccc1N)C(C)C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.