Using CC(C)c1cc2c(cc1C(O)c1ccccc1)OCO2, O=C(O)CS to produce CC(C)c1cc2c(cc1C(SCC(=O)O)c1ccccc1)OCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.