Using O[C@H]1C[C@H]2C[C@@H]1C[C@@H]2OCc1ccccc1 to produce O=C1C[C@H]2C[C@@H]1C[C@@H]2OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.