(2R,4S)-4-hydroxypyrrolidine-2-carbohydrazide hydrochloride

(2R,4S)-4-hydroxypyrrolidine-2-carboxylic acid

(2R,4S)-4-hydroxypyrrolidine-2-carboxylic acid hydrochloride

(2R,4S)-4-[(8aS)-6-oxo-octahydropyrrolo[1,2-a]pyrazin-2-yl]-N-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethyl]-2-(4-fluoro-2-methylphenyl)-N-methylpiperidine-1-carboxamide hydrochloride

(2R,4S)-4-{[(tert-butoxy)carbonyl]amino}-1-{[(9H-fluoren-9-yl)methoxy]carbonyl}pyrrolidine-2-carboxylic acid

(2R,4S)-4-{[(tert-butoxy)carbonyl]amino}-5-ethoxy-2-fluoro-5-oxopentanoic acid

(2R,4S)-5-(tert-butoxy)-4-{[(tert-butoxy)carbonyl]amino}-2-fluoro-5-oxopentanoic acid

(2r,4s)-5-azaspiro[3.4]octan-2-ol hydrochloride

(2r,4s)-5-azaspiro[3.5]nonan-2-ol hydrochloride

(2r,4s)-5-oxaspiro[3.4]octan-2-amine hydrochloride

(2r,4s)-5-oxaspiro[3.4]octane-2-carboxylic acid

(2r,4s)-5-[(tert-butoxy)carbonyl]-5-azaspiro[3.5]nonane-2-carboxylic acid

(2r,4s)-6-azaspiro[3.4]octan-2-ol hydrochloride

(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolane-2-carbonitrile

(2R,4S,5S)-4-hydroxy-5-(hydroxymethyl)pyrrolidine-2-carboxylic acid hydrochloride

(2R,4s,6S)-4-amino-2,6-dimethyl-1lambda6-thiane-1,1-dione hydrochloride

(2R,4s,6S)-4-bromo-2,6-dimethyloxane

(2R,5R)-1-[(tert-butoxy)carbonyl]-5-methylpyrrolidine-2-carboxylic acid

(2R,5R)-1-[(tert-butoxy)carbonyl]-5-phenylpyrrolidine-2-carboxylic acid

(2R,5R)-1-{[(9H-fluoren-9-yl)methoxy]carbonyl}-5-phenylpyrrolidine-2-carboxylic acid

(2R,5R)-2,5-dimethylmorpholin-3-one

(2R,5R)-2,5-dimethylmorpholine

(2R,5R)-2,5-dimethylpyrrolidine hydrochloride

(2R,5R)-2,6-diamino-5-hydroxyhexanoic acid hydrochloride

(2R,5R)-2-methyl-5-(prop-1-en-2-yl)cyclohexan-1-one

(2R,5R)-2-methyl-5-phenylpyrrolidine hydrochloride

(2R,5R)-4-[(tert-butoxy)carbonyl]-5-methylmorpholine-2-carboxylic acid

(2R,5R)-4-{[(9H-fluoren-9-yl)methoxy]carbonyl}-5-methylmorpholine-2-carboxylic acid

(2R,5R)-5-(4-methoxyphenyl)pyrrolidine-2-carboxylic acid hydrochloride

(2R,5R)-5-methyl-2-(propan-2-yl)cyclohexan-1-one

(2R,5R)-5-methylmorpholine-2-carboxylic acid hydrochloride

(2R,5R)-5-phenylpyrrolidine-2-carboxamide

(2R,5R)-5-phenylpyrrolidine-2-carboxamide hydrochloride

(2R,5R)-5-phenylpyrrolidine-2-carboxylic acid hydrochloride

(2R,5S)-1,4-dioxane-2,5-dicarboxylic acid

(2R,5S)-1-benzylpyrrolidine-2,5-dicarboxylic acid

(2R,5S)-1-[(tert-butoxy)carbonyl]-5-carbamoylpyrrolidine-2-carboxylic acid

(2R,5S)-1-[(tert-butoxy)carbonyl]-5-phenylpyrrolidine-2-carboxylic acid

(2R,5S)-1-{[(9H-fluoren-9-yl)methoxy]carbonyl}pyrrolidine-2,5-dicarboxylic acid

(2R,5S)-2,5-bis(bromomethyl)oxolane

(2R,5S)-2,5-dihydrofuran-2,5-dicarboxylic acid

(2R,5S)-2,5-dimethylpiperazine

(2R,5S)-2,5-dimethylpyrrolidine hydrochloride

(2R,5S)-2,6-diamino-5-hydroxyhexanoic acid hydrochloride

(2R,5S)-2-cyclopropyl-5-(4-fluorophenyl)pyrrolidine