Using COc1cc(C(=O)c2coc3c([N+](=O)[O-])c(OC)ccc23)cc(OC)c1OC to produce COc1cc(C(=O)c2coc3c(N)c(OC)ccc23)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.