ethyl 7-(4-bromo-2-methylphenyl)-7-oxoheptanoate

ethyl 6-(4-t-butylphenyl)-6-oxohexanoate

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

ethyl 8-(2-ethoxyphenyl)-8-oxooctanoate

Ethyl 4-(4-ethoxyphenyl)-4-oxobutyrate

Ethyl 7-oxo-7-(4-isopropoxyphenyl)heptanoate

ethyl 6-oxo-6-(4-pentyloxyphenyl)hexanoate

Ethyl 4-(4-heptyloxyphenyl)-4-oxobutyrate

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

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

ethyl 5-(2,6-dimethoxyphenyl)-5-oxovalerate