Using COC(=O)CCc1cc(C(=O)c2ccc(OC)cc2)c(OC)cc1OC to produce COc1ccc(C(=O)c2cc(CCC(=O)O)c(OC)cc2OC)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.