Using COc1cc2c(c3c1c(=O)c1cc4ccccc4c([N+](=O)[O-])c1n3C)C=CC(C)(C)O2 to produce COc1cc2c(c3c1c(=O)c1cc4ccccc4c(N)c1n3C)C=CC(C)(C)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.