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

(R)-3-(2-Hydroxy-ethylsulfanyl)-piperidine-1-carboxylic acid benzyl ester

(R)-3-(2-Amino-ethylsulfanyl)-piperidine-1-carboxylic acid tert-butyl ester

3-(2-Amino-ethylsulfanylmethyl)-pyrrolidine-1-carboxylic acid benzyl ester

3-(2-Amino-ethylsulfanylmethyl)-piperidine-1-carboxylic acid benzyl ester

(S)-3-(Carboxymethyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester

(S)-3-(Carboxymethyl-methyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester

3-[(Carboxymethyl-methyl-amino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

(S)-3-(Carboxymethyl-ethyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

[(4-tert-Butoxycarbonylamino-cyclohexyl)-ethyl-amino]-acetic acid

[(4-tert-Butoxycarbonylamino-cyclohexyl)-isopropyl-amino]-acetic acid