ethyl 5-(2,4-difluorophenyl)-5-oxovalerate

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

ethyl 2,2-dimethyl-4-oxo-4-(3,4,5-trifluorophenyl)butyrate

Ethyl 4-cyclohexyl-4-oxobutyrate

Ethyl 6-cyclohexyl-6-oxohexanoate

Ethyl 8-cyclobutyl-8-oxooctanoate

Ethyl 5,5-dimethyl-4-oxohexanoate

Ethyl 7-oxononanoate

Ethyl 6-oxodecanoate

Ethyl 6-oxoundecanoate

Ethyl 5-oxo-5-(2-pyridyl)valerate