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

Ethyl 5-(3,4,5-trichlorophenyl)-5-oxovalerate

Ethyl 8-(2,4,5-trimethoxyphenyl)-8-oxooctanoate

Ethyl 8-(2,3,4-trimethoxyphenyl)-8-oxooctanoate

Ethyl 8-(4-n-Propylphenyl)-8-oxooctanoate

Ethyl 7-(4-n-Butylphenyl)-7-oxoheptanoate

Ethyl 4-[4-(Ethylthio)phenyl]-4-oxobutanoate

Ethyl 4-(4-tert-Butyl-2,6-dimethylphenyl)-4-oxobutanoate

Ethyl 4-(2,3,4,5,6-Pentamethylphenyl)-4-oxobutanoate

Ethyl 4-(4-Methoxy-2-methylphenyl)-4-oxobutanoate

Ethyl 4-(2-Methoxy-5-methylphenyl)-4-oxobutanoate