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

2-(2-Amino-ethylsulfanylmethyl)-pyrrolidine-1-carboxylic acid tert-butyl ester

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

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

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

4-(Carboxymethyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

(2-tert-Butoxycarbonylamino-cyclohexylamino)-acetic acid

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

[(2-tert-Butoxycarbonylamino-cyclohexyl)-methyl-amino]-acetic acid

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

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