Using CCOC(=O)[C@@H](OC(C)(C)C)c1c(C)cc2c(Br)cccc2c1OS(C)(=O)=O, CB1OB(C)OB(C)O1 to produce CCOC(=O)[C@@H](OC(C)(C)C)c1c(C)cc2c(C)cccc2c1OS(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.