ethyl 6-(3,4-dichlorophenyl)-6-oxohexanoate

ethyl 5-(3-iodophenyl)-5-oxovalerate

ethyl 8-(3-nitrophenyl)-8-oxooctanoate

Ethyl 5-oxo-5-(3-trifluoromethylphenyl)valerate

ethyl 8-(2,3-dichlorophenyl)-8-oxooctanoate

ethyl 6-(4-ethylphenyl)-6-oxohexanoate

Ethyl 7-(4-isopropylphenyl)-7-oxoheptanoate

Ethyl 4-oxo-4-(4-n-pentylphenyl)butyrate

ethyl 6-(2-ethoxyphenyl)-6-oxohexanoate

ethyl 4-oxo-4-(4-pentyloxyphenyl)butyrate

ethyl 8-(4-hexyloxyphenyl)-8-oxooctanoate