(S)-2-Amino-1-{3-[(isopropyl-methyl-amino)-methyl]-pyrrolidin-1-yl}-3-methyl-butan-1-one

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

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

4-(2-Hydroxy-ethyl)-piperazine-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester

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

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

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

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

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

4-((S)-2-Amino-3-methyl-butyryl)-piperazine-1-carboxylic acid benzyl ester

4-Carboxymethyl-[1,4]diazepane-1-carboxylic acid tert-butyl ester