Using CCCC(=O)O, CCCn1cc(Cc2ccc(C(=O)OC)cc2OC)c2cc(C=O)ccc21 to produce CCCn1cc(Cc2ccc(C(=O)OC)cc2OC)c2cc(C(O)C(CC)C(=O)O)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.