Ethyl 6-methyl-5-oxoheptanoate

Ethyl 5-oxo-5-(3-trifluoromethylphenyl)valerate

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

ethyl 6-(4-ethylphenyl)-6-oxohexanoate

Ethyl 7-(4-isopropylphenyl)-7-oxoheptanoate

Ethyl 4-oxo-4-(4-n-pentylphenyl)butyrate

ethyl 6-(2-ethoxyphenyl)-6-oxohexanoate

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

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

ethyl 6-(4-heptyloxyphenyl)-6-oxohexanoate

ethyl 7-(2,6-dimethoxyphenyl)-7-oxoheptanoate