Using COC(=O)c1cc(O)cc(Br)c1, CC(C)(C)OC(=O)CBr to produce COC(=O)c1cc(Br)cc(OCC(=O)OC(C)(C)C)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.