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

ethyl 8-(4-ethylphenyl)-8-oxooctanoate

ethyl 5-oxo-5-(4-n-pentylphenyl)valerate

ethyl 4-(2-ethoxyphenyl)-4-oxobutyrate

Ethyl 7-oxo-7-(4-isopropoxyphenyl)heptanoate

ethyl 7-(4-hexyloxyphenyl)-7-oxoheptanoate

ethyl 6-(2,3-dimethoxyphenyl)-6-oxohexanoate

ethyl 4-(2,6-dimethoxyphenyl)-4-oxobutyrate

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

Ethyl 7-[3-(N,N-Dimethylamino)phenyl]-7-oxoheptanoate

Ethyl 4-[4-(N,N-Diethylamino)phenyl]-4-oxobutanoate