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

(S)-2-Amino-1-(4-dimethylamino-piperidin-1-yl)-3-methyl-butan-1-one

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

(S)-2-Amino-1-[4-(isopropyl-methyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

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

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

(3-Dimethylamino-pyrrolidin-1-yl)-acetic acid

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

[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