Using O=C(Cl)c1ccc([N+](=O)[O-])cc1, Clc1ccccc1 to produce O=C(c1ccc(Cl)cc1)c1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.