[4-((S)-2-Amino-propionylamino)-cyclohexyl]-methyl-carbamic acid benzyl ester

(1R,4R)-[4-((S)-2-Amino-propionylamino)-cyclohexyl]-cyclopropyl-carbamic acid benzyl ester

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

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

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

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

[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-4-ylmethyl]-isopropyl-carbamic acid benzyl ester

[(R)-1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-yl]-cyclopropyl-carbamic acid benzyl ester

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

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

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