(S)-2-Amino-1-(3-dimethylamino-pyrrolidin-1-yl)-3-methyl-butan-1-one

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

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

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

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

(1R,4R)-[4-(Cyclopropyl-methyl-amino)-cyclohexylamino]-acetic acid

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

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

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

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

1-[4-(2-Amino-ethyl)-3-methyl-piperazin-1-yl]-ethanone