Using O[C@@H]1[C@@H](c2cccc(Cl)c2)Oc2ccccc2[C@@H]1O to produce O=C1c2ccccc2O[C@H](c2cccc(Cl)c2)[C@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.