3-氧代十四酸乙酯

2-(1-甲基-2-吡咯烷基亚基)乙酸乙酯

4-(4-甲基苯氧基)-3-氧代丁酸乙酯

ethyl 3-oxononanoate

ethyl 4,4-dimethyl-3-oxohex-5-enoate