2-甲基吲哚-3-羧酸乙酯

(E)-3-(1-吡咯烷酮)巴豆酸乙酯

ethyl 2-methyl-3-oxo-4-pentylcyclopentene-1-carboxylate

3-甲基-3-吡唑啉-5-酮

4-(4-甲氧基苄亚基)-3-甲基-1,2-恶唑-5(4H)-酮