Using O=c1ccoc2ccc(Cc3cc([C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)ccc3Cl)cc12 to produce O=C1CCOc2ccc(Cc3cc([C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)ccc3Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.