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

ethyl 7-(4-biphenyl)-7-oxoheptanoate

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

Ethyl 5-cyclopentyl-5-oxovalerate

Ethyl 6-cyclobutyl-6-oxohexanoate

Ethyl 4-cyclopropyl-4-oxobutyrate

Ethyl 6,6-dimethyl-5-oxoheptanoate

Ethyl 7,7-dimethyl-6-oxooctanoate

Ethyl 6-oxononanoate

ethyl 8-oxoundecanoate

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