Using O=[N+]([O-])c1ccc(Cl)c(-c2ncc(-c3ccccc3)[nH]2)c1 to produce Nc1ccc(Cl)c(-c2ncc(-c3ccccc3)[nH]2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.