Ethyl 4-(3-methoxyphenyl)-4-oxobutyrate

Ethyl 5-oxo-5-(3,4,5-trifluorophenyl)valerate

ethyl 4-oxo-4-(4-phenoxyphenyl)butyrate

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

ethyl 8-(2-naphthyl)-8-oxooctanoate

Ethyl 4-(2-naphthyl)-4-oxobutyrate

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

Ethyl 4-(2,6-difluorophenyl)-4-oxobutyrate

Ethyl 6-(2,5-difluorophenyl)-6-oxohexanoate

Ethyl 4-(3-cyanophenyl)-4-oxobutyrate

Ethyl-5-(4-cyanophenyl)-5-oxovalerate