Using COC(=O)Cc1cc(Br)c(S(=O)(=O)c2ccc(OC)c(C(C)C)c2)c(Br)c1 to produce COc1ccc(S(=O)(=O)c2c(Br)cc(CC(=O)O)cc2Br)cc1C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.