Ethyl 5-(1-naphthyl)-5-oxovalerate

Ethyl 4-oxo-4-(9-Phenanthryl)butyrate

ethyl 5-(2,4-difluorophenyl)-5-oxovalerate

ethyl 8-(2,5-difluorophenyl)-8-oxooctanoate

ethyl 8-(2-fluorophenyl)-8-oxooctanoate

Ethyl 4-(3,5-difluorophenyl)-2,2-dimethyl-4-oxobutyrate

Ethyl 5-cyclopentyl-5-oxovalerate

Ethyl 8-cyclobutyl-8-oxooctanoate

Ethyl 5-oxoheptanoate

Ethyl 7-oxoundecanoate

Ethyl 5-oxo-6,6,6-trifluorohexanoate