Using O=S([O-])[O-], CCCOCCOc1ccc(-c2ccc3c(c2)C=C(C(=O)OCC)CCS3)cc1 to produce CCCOCCOc1ccc(-c2ccc3c(c2)C=C(C(=O)OCC)CCS3(=O)=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.