Using O=C([O-])[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(=O)O to produce O=C1O[C@H]([C@@H](O)C(=O)O)[C@H](O)[C@@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.