ethyl 4-(2,3-dichlorophenyl)-4-oxobutyrate

ethyl 6-(2,5-dichlorophenyl)-6-oxohexanoate

ethyl 8-oxo-8-(4-n-pentylphenyl)octanoate

ethyl 7-(2-ethoxyphenyl)-7-oxoheptanoate

Ethyl 4-oxo-4-(4-isopropoxyphenyl)butyrate

ethyl 6-(4-hexyloxyphenyl)-6-oxohexanoate

ethyl 4-(2,3-dimethoxyphenyl)-4-oxobutyrate

ethyl 4-(2,5-dimethoxyphenyl)-4-oxobutyrate

ethyl 4-(3,4-dimethoxyphenyl)-4-oxobutyrate

Ethyl 6-[3-(N,N-Dimethylamino)phenyl]-6-oxohexanoate

Ethyl 8-[4-(N,N-Dimethylamino)phenyl]-8-oxooctanoate