Using O=C(O)Cc1cnc(-c2ccc([N+](=O)[O-])cc2)n1Cc1ccccc1 to produce Nc1ccc(-c2nc(Cl)c(CC(=O)O)n2Cc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.