Using CC(=O)OC[C@H]1O[C@@H](n2cc(C)c(=O)[nH]c2=O)[C@H](Br)[C@@]1(O)C(C)=O to produce CC(=O)OC[C@H]1O[C@@H](n2cc(C)c(=O)[nH]c2=O)[C@H](Br)[C@@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.