Using CCC1(C)OC(c2ccc(S(C)(=O)=O)cc2)=C(Br)C1=O, OB(O)c1ccccc1 to produce CCC1(C)OC(c2ccc(S(C)(=O)=O)cc2)=C(c2ccccc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.