Using CN1CCC(O)(CNc2c([N+](=O)[O-])c(Cl)nc3ccccc23)CC1 to produce CN1CCC(O)(CNc2c(N)c(Cl)nc3ccccc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.