ethyl 4-oxo-4-(4-n-propoxyphenyl)butyrate

ethyl 7-oxo-7-(4-n-propoxyphenyl)heptanoate

Ethyl 8-oxo-8-(4-isopropoxyphenyl)octanoate

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

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

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

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

ethyl 5-(3,4-dimethoxyphenyl)-5-oxovalerate

Ethyl 5-(4-methoxy-3-nitrophenyl)-5-oxovalerate

Ethyl 8-[3-(N,N-Dimethylamino)phenyl]-8-oxooctanoate

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