Ethyl 5-oxo-5-(3,4,5-trifluorophenyl)valerate

Ethyl 4-(1-naphthyl)-4-oxobutyrate

Ethyl 4-(2,6-difluorophenyl)-4-oxobutyrate

ethyl 7-(2-fluorophenyl)-7-oxoheptanoate

Ethyl-4-(4-cyanophenyl)-4-oxobutyrate

Ethyl 2,2-dimethyl-4-(4-methoxyphenyl)-4-oxobutyrate

ethyl 7-cyclohexyl-7-oxoheptanoate

Ethyl 7-cyclopropyl-7-oxoheptanoate

Ethyl 6-oxooctanoate

Ethyl 7-oxodecanoate

Ethyl 4-oxo-4-(3-pyridyl)butyrate