Using Cc1cc(N2C(=O)c3ccccc3C2=O)[n+]([O-])cc1C, O=P(Cl)(Cl)Cl to produce Cc1cc(N2C(=O)c3ccccc3C2=O)nc(Cl)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.