Using OB(O)c1ccc2c(c1)OCO2, CC1(C)OC(c2ccc(S(C)(=O)=O)cc2)=C(Br)C1=O to produce CC1(C)OC(c2ccc(S(C)(=O)=O)cc2)=C(c2ccc3c(c2)OCO3)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.