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

Ethyl 4-oxooctanoate

Ethyl 6-oxononanoate

Ethyl 5-oxo-5-(2-pyridyl)valerate

Ethyl 2-(2-oxopropyl)benzoate

ethyl 8-(3,4-dichlorophenyl)-8-oxooctanoate

Ethyl 6-methyl-5-oxoheptanoate

Ethyl 5-(2-iodophenyl)-5-oxovalerate

Ethyl 5-(4-iodophenyl)-5-oxovalerate

ethyl 6-(4-nitrophenyl)-6-oxohexanoate

Ethyl 4-oxo-4-(4-trifluoromethylphenyl)butyrate