[(S)-1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-3-yl]-isopopyl-carbamic acid benzyl ester

[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-2-ylmethyl]-isopropyl-carbamic acid benzyl ester

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

[(S)-1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-2-ylmethyl]-cyclopropyl-carbamic acid benzyl ester

[(S)-2-(Benzyloxycarbonylamino-methyl)-pyrrolidin-1-yl]-acetic acid

(3-Benzyloxycarbonylamino-piperidin-1-yl)-acetic acid

[(R)-3-(Benzyloxycarbonyl-methyl-amino)-piperidin-1-yl]-acetic acid

{4-[(Benzyloxycarbonyl-methyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{(S)-2-[(Benzyloxycarbonyl-ethyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

{3-[(Benzyloxycarbonyl-ethyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

[(S)-3-(Benzyloxycarbonyl-isopropyl-amino)-pyrrolidin-1-yl]-acetic acid