(2R,3R)-1-ethyl-5-oxo-2-(3,4,5-trifluorophenyl)pyrrolidine-3-carboxamide

(2R,3R)-1-methyl-2-(1-methyl-1H-pyrazol-4-yl)-5-oxopyrrolidine-3-carboxamide

(2R,3R)-1-[(tert-butoxy)carbonyl]-3-(pentafluoroethyl)pyrrolidine-2-carboxylic acid

(2R,3R)-1-[(tert-butoxy)carbonyl]-3-(trifluoromethyl)pyrrolidine-2-carboxylic acid

(2R,3R)-1-[(tert-butoxy)carbonyl]-3-fluoropiperidine-2-carboxylic acid

(2R,3R)-1-[(tert-butoxy)carbonyl]-3-tert-butylpiperidine-2-carboxylic acid

(2R,3R)-2,3-bis(4-methoxybenzoyloxy)butanedioic acid

(2R,3R)-2,3-bis(4-methylbenzoyloxy)butanedioic acid

(2R,3R)-2,3-bis(benzoyloxy)butanedioic acid

(2R,3R)-2,3-dihydroxybutanedioic acid

(2R,3R)-2,3-dihydroxybutanedioic acid; 2-[(1R)-3-[bis(propan-2-yl)amino]-1-phenylpropyl]-4-methylphenol

(2R,3R)-2,3-dihydroxybutanedioic acid; 2-{[(3aR,4S,6R,6aS)-6-amino-2,2-dimethyl-hexahydrocyclopenta[d][1,3]dioxol-4-yl]oxy}ethan-1-ol

(2R,3R)-2,3-dihydroxybutanedioic acid; 4-[(1S)-1-hydroxy-2-[(propan-2-yl)amino]ethyl]benzene-1,2-diol

(2R,3R)-2-(1,5-dimethyl-1H-pyrazol-4-yl)-1-methyl-5-oxopyrrolidine-3-carboxamide

(2R,3R)-2-(3-chlorophenyl)-1-methyl-5-oxopyrrolidine-3-carboxamide

(2R,3R)-2-(dimethylamino)-3-hydroxybutanoic acid

(2R,3R)-2-(hydroxymethyl)pyrrolidin-3-ol hydrochloride

(2R,3R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxy-4-methylpentanoic acid

(2R,3R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxybutanoic acid

(2R,3R)-2-amino-3-bromobutanoic acid hydrochloride

(2R,3R)-2-amino-3-hydroxybutanoic acid

(2R,3R)-2-amino-3-methoxybutan-1-ol

(2R,3R)-2-amino-3-methylpentanoic acid

(2R,3R)-2-aminobutane-1,3-diol

(2R,3R)-2-aminobutane-1,3-diol hydrochloride

(2R,3R)-2-ethylpyrrolidin-3-ol hydrochloride

(2R,3R)-2-hydroxy-3-methylpentanoic acid

(2R,3R)-2-methylpyrrolidin-3-ol hydrochloride

(2R,3R)-2-[(benzoyloxy)methyl]-4,4-difluoro-5-oxooxolan-3-yl benzoate

(2R,3R)-2-[1-(4-fluorophenyl)-1H-pyrazol-4-yl]-1-methyl-5-oxopyrrolidine-3-carboxamide

(2R,3R)-2-{[(tert-butoxy)carbonyl]amino}-3-hydroxy-4-methylpentanoic acid

(2R,3R)-2-{[(tert-butoxy)carbonyl]amino}-3-hydroxybutanoic acid

(2R,3R)-2-{[(tert-butoxy)carbonyl]amino}-3-methylpentanoic acid

(2R,3R)-3,5,7-trihydroxy-2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-1-benzopyran-4-one

(2R,3R)-3-(benzyloxy)butan-2-ol

(2R,3R)-3-(difluoromethoxy)butan-2-ol

(2R,3R)-3-(tert-butoxy)-1-[(tert-butoxy)carbonyl]azetidine-2-carboxylic acid

(2R,3R)-3-(tert-butoxy)azetidine-2-carboxylic acid

(2R,3R)-3-(trifluoromethoxy)butan-2-ol

(2R,3R)-3-(trifluoromethoxy)butan-2-ol; toluene

(2R,3R)-3-amino-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid hydrochloride

(2R,3R)-3-aminobutan-2-ol

(2R,3R)-3-bromo-2-{[(tert-butoxy)carbonyl]amino}butanoic acid

(2R,3R)-3-fluoro-2-(furan-2-yl)-1-[(1R)-1-phenylethyl]piperidine

(2R,3R)-3-fluoro-2-(furan-2-yl)piperidine hydrochloride