(R)-3-((S)-2-Amino-3-methyl-butyrylamino)-pyrrolidine-1-carboxylic acid benzyl ester

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

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

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

((S)-1-Benzyl-pyrrolidin-3-ylamino)-acetic acid

[(1-Benzyl-piperidin-4-ylmethyl)-amino]-acetic acid

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

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

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

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

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