[(R)-1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-yl]-isopropyl-carbamic acid tert-butyl ester

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

(1R,4R)-[4-((S)-2-Amino-3-methyl-butyrylamino)-cyclohexyl]-isopropyl-carbamic acid tert-butyl ester

[1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-3-yl]-cyclopropyl-carbamic acid tert-butyl ester

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

((S)-3-tert-Butoxycarbonylamino-pyrrolidin-1-yl)-acetic acid

[(S)-3-(tert-Butoxycarbonyl-methyl-amino)-piperidin-1-yl]-acetic acid

2-(3-((叔丁氧基羰基)(甲基)氨基)哌啶-1-基)乙酸, [3-(tert-Butoxycarbonyl-methyl-amino)-piperidin-1-yl]-acetic acid

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

[3-(tert-Butoxycarbonyl-ethyl-amino)-piperidin-1-yl]-acetic acid

[4-(tert-Butoxycarbonyl-ethyl-amino)-cyclohexylamino]-acetic acid