Using [O-][Cl+2]([O-])[O-], O=C1c2ccccc2-c2cccc3cccc1c23 to produce O=C1c2ccccc2-c2ccc(Cl)c3cccc1c23, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.