2-溴-3-戊酮

1-(dimethylamino)-2-methylpent-1-en-3-one

1,3,5-trimethylpiperidin-4-one

1-ethyl-2,3,4,5-tetramethylcyclopenta-1,3-diene

2,2-diethyl-6-methyl-1,3-dioxin-4-one