ethyl 8-(4-nitrophenyl)-8-oxooctanoate

ethyl 4-oxo-4-(4-pentyloxyphenyl)butyrate

ethyl 5-(4-hexyloxyphenyl)-5-oxovalerate

ethyl 5-(4-heptyloxyphenyl)-5-oxovalerate

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

Ethyl 7-(2,4-dimethoxyphenyl)-7-oxoheptanoate

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

ethyl 7-(3,5-dimethoxyphenyl)-7-oxoheptanoate

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

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

Ethyl 7-[4-(N,N-Dimethylamino)phenyl]-7-oxoheptanoate