Using CCOC(=O)CCC(Oc1cc(OCc2ccsc2)ccc1C(=O)C(=O)O)c1ccccc1C to produce Cc1ccccc1C(CCC(=O)O)Oc1cc(OCc2ccsc2)ccc1C(=O)C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.