Ethyl 4-(3-methoxyphenyl)-4-oxobutyrate

ethyl 6-(3,5-difluorophenyl)-6-oxohexanoate

ethyl 4-(3-fluoro-4-methylphenyl)-4-oxobutyrate

Ethyl 5-(2-methoxyphenyl)-5-oxovalerate

Ethyl 5-(2-naphthyl)-5-oxovalerate

Ethyl 4-(2,3-difluorophenyl)-4-oxobutyrate

Ethyl 6-(2,5-difluorophenyl)-6-oxohexanoate

Ethyl 4-(2-fluorophenyl)-4-oxobutyrate

ethyl 2,2-dimethyl-4-oxo-4-(3,4,5-trifluorophenyl)butyrate

ethyl 7-cyclopentyl-7-oxoheptanoate