Using O=C(c1ccccc1)c1nc(Cl)ccc1[N+](=O)[O-], CO to produce COc1ccc([N+](=O)[O-])c(C(=O)c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.