Using C[C@H]1O[C@H](OC2[C@@H](O)[C@@H](O)C(O)[C@H](O)[C@H]2O)[C@@H](N)C[C@@H]1N=C(N)C(=O)O to produce OC1C(O)C(O)C(O)C(O)C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.