Ethyl 5-(2,3,4,5-tetrafluorophenyl)-5-oxovalerate

Ethyl 4-(4-n-Butylphenyl)-4-oxobutanoate

Ethyl 4-(4-n-Propylphenyl)-4-oxobutanoate

Ethyl 5-(3-Bromo-2-thienyl)-5-oxovalerate

Ethyl 5-(3-Methyl-2-thienyl)-5-oxovalerate

Ethyl 4-[3,4-(Ethylenedioxy)phenyl]-4-oxobutanoate

Ethyl 5-(2,3,5,6-Tetramethylphenyl)-5-oxovalerate

Ethyl 5-(3-Fluoro-4-methoxyphenyl)-5-oxovalerate

Ethyl 4-(3-Chloro-4-fluorophenyl)-4-oxobutanoate

Ethyl 4-(4-Methoxy-3-methylphenyl)-4-oxobutanoate

Ethyl 4-(2-chlorophenyl)-4-oxobutyrate