N-3,3-triethyl-2,4-dihydroxybutyramide

4,4-diethyl-4,5-dihydrofuran-2,3-dione

3-ethyl-2-(1-ethyl-propyliden)-oxazolidine-4,5-dione

2-ethyl-butyric acid ethylamide

4,4-diethyl-4,5-dihydro-3-hydroxy-2(3H)-furanone