Using CCCCOS(C)(=O)=O, O=C(Nc1ccc(F)cc1F)C(F)(F)F to produce CCCCN(C(=O)C(F)(F)F)c1ccc(F)cc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.