Using O=C(Cl)c1cc(Cl)ccc1OC1CC1, CCOC(=O)CC(=O)[O-] to produce CCOC(=O)CC(=O)c1cc(Cl)ccc1OC1CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.