4-(4-Amino-1-methyl-3-oxo-butyl)-benzoic acid ethyl ester
l-3-(p-carbetoxyphenyl)butyric acid
d-3-(p-carbetoxyphenyl)butyric acid
4-(4-Azido-1-methyl-3-oxo-butyl)-benzoic acid ethyl ester
4-(4-Chloro-1-methyl-3-oxo-butyl)-benzoic acid ethyl ester