Ethyl 5-(4-methylphenyl)-5-oxovalerate

Ethyl 4-(3,5-dichlorophenyl)-4-oxobutyrate

Ethyl 5-(3,5-difluorophenyl)-5-oxovalerate

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

ethyl 6-(1-naphthyl)-6-oxohexanoate

ethyl 6-(2-naphthyl)-6-oxohexanoate

ethyl 8-(2,4-difluorophenyl)-8-oxooctanoate

Ethyl 5-(2-fluorophenyl)-5-oxovalerate

Ethyl 6-(4-cyanophenyl)-6-oxohexanoate

Ethyl 8-(4-cyanophenyl)-8-oxooctanoate