Ethyl 6-cyclopropyl-6-oxohexanoate

Ethyl 7-oxodecanoate

Ethyl 4-oxo-4-(3-pyridyl)butyrate

Ethyl 3-(1-oxo-2-phenylethyl)benzoate

ethyl 7-(3-bromo-4-methylphenyl)-7-oxoheptanoate

Ethyl 4-(4-bromo-2-methylphenyl)-4-oxobutyrate

ethyl 8-(2-iodophenyl)-8-oxooctanoate

Ethyl 5-(3-nitrophenyl)-5-oxovalerate

Ethyl 5-(4-nitrophenyl)-5-oxovalerate

ethyl 4-(2,3-dichlorophenyl)-4-oxobutyrate

ethyl 7-(2,4-dichlorophenyl)-7-oxoheptanoate