ethyl 7-(3-fluorophenyl)-7-oxoheptanoate

ethyl 8-(3,5-difluorophenyl)-8-oxooctanoate

ethyl 5-oxo-5-(3-phenoxyphenyl)valerate

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

Ethyl 7-oxo-7-(9-Phenanthryl)heptanoate

ethyl 5-(2,5-difluorophenyl)-5-oxovalerate

ethyl 7-(2,6-difluorophenyl)-7-oxoheptanoate

Ethyl 4-(4-biphenyl)-4-oxobutyrate

ethyl 2,2-dimethyl-4-(3-methoxyphenyl)-4-oxobutyrate

ethyl 2,2-dimethyl-4-oxo-4-(4-thiomethylphenyl)butyrate

Ethyl 6-cyclopropyl-6-oxohexanoate