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

ethyl 5-oxo-5-(4-phenoxyphenyl)valerate

ethyl 8-(2-methoxyphenyl)-8-oxooctanoate

ethyl 7-(2-naphthyl)-7-oxoheptanoate

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