Using O, COc1cc(OC)c(CSc2ccccc2B2OC(C)(C)C(C)(C)O2)c(OC)c1 to produce COc1cc(OC)c(CSc2ccccc2-c2cccc(O)c2)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.