Using CSc1cc2nc(Br)n([C@@H]3OC[C@@H](OC(C)=O)[C@@H](OC(C)=O)[C@H]3OC(C)=O)c2cc1Cl to produce CSc1cc2nc(Br)n([C@@H]3OC[C@@H](O)[C@@H](O)[C@H]3O)c2cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.