Using CC(C)(C)OC(=O)COC(=O)C1=CCCCC1S(=O)(=O)Nc1ccc(F)cc1F to produce O=C(O)COC(=O)C1=CCCCC1S(=O)(=O)Nc1ccc(F)cc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.