Using COC(=O)c1c(C)n(-c2ccccc2)c(=O)c2c([N+](=O)[O-])cccc12 to produce COC(=O)c1c(C)n(-c2ccccc2)c(=O)c2c(N)cccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.