lithium;(2S,4S)-4-azido-1-[(2R)-3-cyclohexyl-2-(naphthalene-2-carbonylamino)propanoyl]pyrrolidine-2-carboxylic acid;1-O-tert-butyl 2-O-methyl (2S,4S)-4-azidopyrrolidine-1,2-dicarboxylate;1-O-tert-butyl 2-O-methyl (2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate;(2R)-3-cyclohexyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid;methyl (2S,4S)-1-[(2R)-2-aminochloranuidyl-3-cyclohexylpropanoyl]-4-azidopyrrolidine-2-carboxylate;methyl (2S,4S)-4-azido-1-[(2R)-3-cyclohexyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]pyrrolidine-2-carboxylate;methyl (2S,4S)-4-azido-1-[(2R)-3-cyclohexyl-2-(naphthalene-2-carbonylamino)propanoyl]pyrrolidine-2-carboxylate;methyl (2S,4S)-4-azidopyrrolidine-2-carboxylate;naphthalene-2-carbonyl chloride;hydroxide;dihydrochloride