Ethyl 4-[3-(N,N-Dimethylamino)phenyl]-4-oxobutanoate

Ethyl 4-(2,4,5-trimethoxyphenyl)-4-oxobutanoate

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

Ethyl 6-(4-n-Propylphenyl)-6-oxohexanoate

Ethyl 5-[4-(Ethylthio)phenyl]-5-oxovalerate

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

Ethyl 5-(3-Fluoro-2-methylphenyl)-5-oxovalerate

Ethyl 5-(4-Methoxy-3-methylphenyl)-5-oxovalerate

ethyl 5-[4-(2-Methoxyethoxy)phenyl]-5-oxovalerate

2-(1,3-Dioxolan-2-ylmethyl)-1,4-dimethoxybenzene

2-(1,3-Dioxolan-2-ylmethyl)naphthalene