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

(4-Dimethylamino-piperidin-1-yl)-acetic acid

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

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

[4-(Cyclopropyl-methyl-amino)-cyclohexylamino]-acetic acid

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

4-(2-Amino-ethyl)-[1,4]diazepane-1-carboxylic acid tert-butyl ester

4-(2-Chloro-acetyl)-[1,4]diazepane-1-carboxylic acid tert-butyl ester

4-(2-Chloro-acetyl)-2-methyl-piperazine-1-carboxylic acid benzyl ester

1-Acetyl-4-((S)-2-amino-3-methyl-butyryl)-piperazine-2-carboxylic acid methyl ester

4-Carboxymethyl-piperazine-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester