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

(1R,4R)-[4-((S)-2-Amino-3-methyl-butyrylamino)-cyclohexyl]-carbamic acid benzyl ester

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

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

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

(1-Benzyl-piperidin-3-ylamino)-acetic acid

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

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

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

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

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

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

2-((R)-1-Benzyl-piperidin-3-ylamino)-ethanol

2-[(1-Benzyl-piperidin-3-ylmethyl)-amino]-ethanol

2-[(1-Benzyl-pyrrolidin-2-ylmethyl)-methyl-amino]-ethanol