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

ethyl 2,2-dimethyl-4-(3,5-dimethylphenyl)-4-oxobutyrate

ethyl 6-(3,5-dichlorophenyl)-6-oxohexanoate

ethyl 5-(3,4-difluorophenyl)-5-oxovalerate

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