Using CCCCCCCCCCCOc1ccc(CC(=O)O)cc1, COC(=O)C(O)c1ccccc1 to produce CCCCCCCCCCCOc1ccc(CC(=O)OC(C(=O)OC)c2ccccc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.