Using COC(=O)CC(=O)OC, CCOC(OCC)c1ccc(CBr)cc1 to produce CCOC(OCC)c1ccc(CC(C(=O)OC)C(=O)OC)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.