Using CC(=O)OC1(CCC(C)(F)F)CCN(C(=O)OC(C)(C)C)CC1 to produce CC(F)(F)CCC1(O)CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.