Using O=C(C(F)(F)F)C(F)(F)F, CSc1ccc(-c2ncsc2C(C)C)cc1 to produce CSc1ccc(-c2nc(C(O)(C(F)(F)F)C(F)(F)F)sc2C(C)C)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.