ethyl 5-(4-ethoxyphenyl)-5-oxovalerate

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

Ethyl 6-oxo-6-(4-isopropoxyphenyl)hexanoate

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

ethyl 5-(2,3-dimethoxyphenyl)-5-oxovalerate

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

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

ethyl 8-(3,5-dimethoxyphenyl)-8-oxooctanoate

Ethyl 5-[3-(N,N-Dimethylamino)phenyl]-5-oxovalerate

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

Ethyl 7-(4-Chloro-2-fluorophenyl)-7-oxoheptanoate

Ethyl 7-(4-Chloro-2-methoxyphenyl)-7-oxoheptanoate

Ethyl 5-[2-Chloro-4-(methylthio)phenyl]-5-oxovalerate

Ethyl 8-(2-Chloro-6-fluorophenyl)-8-oxooctanoate

Ethyl 4-(3,4,5-trimethoxyphenyl)-4-oxobutanoate