Using CC(=O)Oc1cc2c(c([N+](=O)[O-])c1O)CN(c1ccc(Cl)cc1)C2=O to produce O=C1c2cc(O)c(O)c([N+](=O)[O-])c2CN1c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.