Using CC(C)(C)OC(=O)NC(C)(C(=O)OC(C)(C)C)c1cc(F)cc(F)c1 to produce CC(C)(C)OC(=O)NC(C)(C=O)c1cc(F)cc(F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.