ethyl 7-(3,5-difluorophenyl)-7-oxoheptanoate

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

ethyl 7-(2,6-difluorophenyl)-7-oxoheptanoate

Ethyl 4-(4-biphenyl)-4-oxobutyrate

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

ethyl 2,2-dimethyl-4-oxo-4-(4-thiomethylphenyl)butyrate

Ethyl 6-cyclopropyl-6-oxohexanoate

Ethyl 7,7-dimethyl-6-oxooctanoate

Ethyl 6-oxoundecanoate

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

Ethyl 4-(2-oxopropyl)benzoate