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

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

Ethyl 5-(4-Chloro-2-methoxyphenyl)-5-oxovalerate

Ethyl 6-(5-Chloro-2-methoxyphenyl)-6-oxohexanoate

Ethyl 4-(2-Chloro-6-fluorophenyl)-4-oxobutanoate

Ethyl 7-(2,3,4,5-tetrafluorophenyl)-7-oxoheptanoate