2-(2-Hydroxy-ethylsulfanylmethyl)-pyrrolidine-1-carboxylic acid benzyl ester

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

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

2-[(Carboxymethyl-amino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

(1R,4R)-(4-tert-Butoxycarbonylamino-cyclohexylamino)-acetic acid

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

2-[(Carboxymethyl-ethyl-amino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

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

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

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

2-[(Carboxymethyl-cyclopropyl-amino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester