(S)-2-Amino-1-(3-dimethylaminomethyl-piperidin-1-yl)-3-methyl-butan-1-one

(2-Dimethylaminomethyl-piperidin-1-yl)-acetic acid

[(R)-3-(Isopropyl-methyl-amino)-piperidin-1-yl]-acetic acid

[2-(Isopropyl-methyl-amino)-cyclohexylamino]-acetic acid

{4-[(Cyclopropyl-methyl-amino)-methyl]-piperidin-1-yl}-acetic acid

1-[4-(2-Hydroxy-ethyl)-2-methyl-piperazin-1-yl]-ethanone

4-(2-Amino-ethyl)-2-methyl-piperazine-1-carboxylic acid benzyl ester

1-(4-Acetyl-3-methyl-piperazin-1-yl)-2-chloro-ethanone

4-(2-Amino-acetyl)-3-methyl-piperazine-1-carboxylic acid tert-butyl ester

4-Carboxymethyl-piperazine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester

(4-Acetyl-2-methyl-piperazin-1-yl)-acetic acid