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

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

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

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

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

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

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

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

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

[3-(苄氧基羰基-乙基-氨基)-吡咯烷-1-基]-乙酸, [3-(Benzyloxycarbonyl-ethyl-amino)-pyrrolidin-1-yl]-acetic acid

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

(1R,4R)-[4-(Benzyloxycarbonyl-ethyl-amino)-cyclohexylamino]-acetic acid

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

[(S)-3-(Benzyloxycarbonyl-cyclopropyl-amino)-piperidin-1-yl]-acetic acid

[2-(Benzyloxycarbonyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid