Using OB(O)c1ccc2c(c1)OCO2, CC(C)(C)OC(=O)c1cncc(Br)c1 to produce CC(C)(C)OC(=O)c1cncc(-c2ccc3c(c2)OCO3)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.