Using CCOC(=O)C(=O)CC(=O)c1cc(Cc2ccccc2)cc(OC)c1OC to produce COc1cc(Cc2ccccc2)cc(C(=O)CC(=O)C(=O)O)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.