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