Using O=C(Br)[C@](O)(C(=O)c1ccccc1)[C@@](O)(C(=O)c1ccccc1)[C@@](O)(CO)C(=O)c1ccccc1 to produce O=C[C@](O)(C(=O)c1ccccc1)[C@@](O)(C(=O)c1ccccc1)[C@@](O)(CO)C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.