1-二甲基呋喃-1-3-酮

trimethyl(3-oxobutyl)azanium,iodide

4-乙酰基-2-丁酮

5-硝基-2-戊酮

ethyl 7-oxo-1,2,3,4,5,6-hexahydronaphthalene-4a-carboxylate