ethyl 4-oxo-4-(4-thiomethylphenyl)butyrate

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

ethyl 6-(2,6-difluorophenyl)-6-oxohexanoate

Ethyl 7-(3-cyanophenyl)-7-oxoheptanoate

Ethyl 7-(4-cyanophenyl)-7-oxoheptanoate

Ethyl 4-cyclopentyl-4-oxobutyrate

ethyl 7-cyclobutyl-7-oxoheptanoate

Ethyl 4-oxohexanoate

Ethyl 4-oxononanoate

ethyl 8-oxoundecanoate

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