Using O=C(Cn1c(-c2cccc([N+](=O)[O-])c2)c(Cl)nc(Cl)c1=O)OCc1ccccc1 to produce Nc1cccc(-c2c(Cl)nc(Cl)c(=O)n2CC(=O)OCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.