Using CCOC(=O)C(=O)C(Cl)c1ccccc1, NC(=S)C(F)(F)F to produce CCOC(=O)c1nc(C(F)(F)F)sc1-c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.