ethyl 4-oxo-4-(4-thiomethylphenyl)butyrate

Ethyl 6-oxo-6-(9-Phenanthryl)hexanoate

Ethyl 7-oxo-7-(9-Phenanthryl)heptanoate

ethyl 7-(2,5-difluorophenyl)-7-oxoheptanoate

ethyl 5-(2,6-difluorophenyl)-5-oxovalerate

ethyl 8-(2-fluorophenyl)-8-oxooctanoate

Ethyl 7-(4-cyanophenyl)-7-oxoheptanoate

ethyl 2,2-dimethyl-4-(3-fluorophenyl)-4-oxobutyrate

ethyl 7-cyclohexyl-7-oxoheptanoate

Ethyl 4-cyclopropyl-4-oxobutyrate

ethyl 8,8-dimethyl-7-oxononanoate

Ethyl 6-oxodecanoate

Ethyl 3-(1,3-dioxan-2-yl)propionate

ethyl 5-oxo-5-(3-pyridyl)valerate

Ethyl 4-propionylbenzoate