Ethyl 4-(2,3-difluorophenyl)-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

ethyl 2-(2-oxo-2-phenylethyl)benzoate

Ethyl 3-(1-oxo-2-phenylethyl)benzoate

ethyl 6-(3,4-dichlorophenyl)-6-oxohexanoate