3-环己基-3-氧代丙酸乙酯

3-氧代-5-苯基-戊酸乙酯

ethyl 6-methyl-3-oxohept-4-enoate

4-ethoxy-2-ethoxycarbonyl-4-oxobutanoate

1-环丙基-6,7,8-三氟-1,4-二氢-4-氧代-3-喹啉羧酸乙酯