(S)-3-[((S)-2-Amino-3-methyl-butyryl)-methyl-amino]-pyrrolidine-1-carboxylic acid benzyl ester

(R)-3-[((S)-2-Amino-3-methyl-butyryl)-ethyl-amino]-pyrrolidine-1-carboxylic acid benzyl ester

{2-[((S)-2-Amino-3-methyl-butyryl)-ethyl-amino]-cyclohexyl}-carbamic acid benzyl ester

[(1-Benzyl-pyrrolidin-3-ylmethyl)-amino]-acetic acid

[(1-Benzyl-piperidin-3-ylmethyl)-amino]-acetic acid

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

[((S)-1-Benzyl-pyrrolidin-2-ylmethyl)-ethyl-amino]-acetic acid

[(1-Benzyl-pyrrolidin-3-ylmethyl)-ethyl-amino]-acetic acid

[(1-Benzyl-pyrrolidin-3-yl)-isopropyl-amino]-acetic acid

[((S)-1-Benzyl-piperidin-3-yl)-isopropyl-amino]-acetic acid

[((R)-1-Benzyl-pyrrolidin-3-yl)-cyclopropyl-amino]-acetic acid