Using COc1ncccc1C(=O)CC(=O)c1ccc([N+](=O)[O-])cc1 to produce O=c1cc(-c2ccc([N+](=O)[O-])cc2)oc2ncccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.