Ethyl 5-cyclopropyl-5-oxovalerate

Ethyl 4-oxooctanoate

Ethyl 7-oxoundecanoate

ethyl 8-oxoundecanoate

Ethyl 4-oxo-4-(2-pyridyl)butyrate

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

ethyl 3-methyl-5-oxo-5-phenylvalerate

Ethyl 4-(3-bromo-5-methylphenyl)-4-oxobutyrate

ethyl 5-(3-bromo-5-methylphenyl)-5-oxovalerate

ethyl 6-(3-iodophenyl)-6-oxohexanoate

Ethyl 4-(3-nitrophenyl)-4-oxobutyrate

ethyl 8-oxo-8-(2-trifluoromethylphenyl)octanoate

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

ethyl 7-(2,3-dichlorophenyl)-7-oxoheptanoate

ethyl 7-(4-ethylphenyl)-7-oxoheptanoate