ethyl 6-(4-bromo-2-methylphenyl)-6-oxohexanoate

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

ethyl 7-(4-iodophenyl)-7-oxoheptanoate

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

ethyl 7-oxo-7-(4-trifluoromethylphenyl)heptanoate

ethyl 5-(2,5-dichlorophenyl)-5-oxovalerate

ethyl 5-(4-t-butylphenyl)-5-oxovalerate

Ethyl 4-(4-hexylphenyl)-4-oxobutyrate

ethyl 7-(4-ethoxyphenyl)-7-oxoheptanoate

Ethyl 6-oxo-6-(4-n-propoxyphenyl)hexanoate

ethyl 5-oxo-5-(4-pentyloxyphenyl)valerate