Using C=Cc1ccc(C(C(F)(F)F)C(F)(F)F)cc1, CC(C)(C)O to produce O=Cc1ccc(C(C(F)(F)F)C(F)(F)F)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.