Ethyl 5-oxo-5-(4-pyridyl)valerate

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

ethyl 6-(2,4-dichlorophenyl)-6-oxohexanoate

ethyl 7-(2,5-dichlorophenyl)-7-oxoheptanoate

ethyl 5-(4-isopropylphenyl)-5-oxovalerate

ethyl 6-(4-hexylphenyl)-6-oxohexanoate

Ethyl 4-(4-ethoxyphenyl)-4-oxobutyrate