Using COc1c(Cl)cc(Cl)cc1Br, COB1OC(C)(C)C(C)(C)O1 to produce COc1c(Cl)cc(Cl)cc1B1OC(C)(C)C(C)(C)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.