(S)-2-Amino-1-[(S)-3-(cyclopropyl-methyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

[(R)-3-(Cyclopropyl-methyl-amino)-pyrrolidin-1-yl]-acetic acid

4-(2-Hydroxy-ethyl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

2-(3,4-Dimethyl-piperazin-1-yl)-ethanol

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

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

2-Chloro-1-(2,4-dimethyl-piperazin-1-yl)-ethanone

4-Carboxymethyl-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

(3,4-Dimethyl-piperazin-1-yl)-acetic acid

2-[(2,4-Dichloro-benzyl)-methyl-amino]-ethanol

2-[(3,4-Dichloro-benzyl)-ethyl-amino]-ethanol