Using CC(=O)O[C@H]1[C@H](OC(C)=O)[C@H](n2c(Br)nc3cc(Cl)c(Cl)cc32)OC[C@@H]1OC(C)=O to produce O[C@H]1[C@H](O)[C@@H](n2c(Br)nc3cc(Cl)c(Cl)cc32)OC[C@@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.