Using COCOc1c(Br)ccc(OC)c1OCC1CC1, CC1(C)OB(c2cccc3c2CCC3=O)OC1(C)C to produce COCOc1c(-c2cccc3c2CCC3=O)ccc(OC)c1OCC1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.