Using O=[Mn](=O)(=O)[O-], COc1ccccc1C1OC(=O)c2cc(Br)ccc21 to produce COc1ccccc1C(=O)c1ccc(Br)cc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.