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

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

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

(1-Benzyl-piperidin-4-ylamino)-acetic acid

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

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

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

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

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

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