(2S)-5-oxo-1-(propan-2-yl)pyrrolidine-2-carboxylic acid

(2S)-5-oxooxolane-2-carboxylic acid

(2S)-5-oxopyrrolidine-2-carboxylic acid

(2S)-5-{[(benzyloxy)carbonyl]amino}-2-{[(tert-butoxy)carbonyl]amino}pentanoic acid

(2S)-5-{[(tert-butoxy)carbonyl]amino}-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoic acid

(2S)-6,6-dimethylmorpholine-2-carboxylic acid hydrochloride

(2S)-6,7-difluoro-2-methyl-10-oxo-4-oxa-1-azatricyclo[7.3.1.0,5,13]trideca-5(13),6,8,11-tetraene-11-carboxylic acid

(2S)-6-(1-aminocyclopropyl)-7-fluoro-2-methyl-10-oxo-4-oxa-1-azatricyclo[7.3.1.0,5,13]trideca-5(13),6,8,11-tetraene-11-carboxylic acid; methanesulfonic acid

(2S)-6-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-6-acetamido-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-6-amino-2-(3-aminopropanamido)hexanoic acid dihydrochloride

(2S)-6-amino-2-(4-carboxybutanamido)hexanoic acid

(2S)-6-amino-2-(4-carboxybutanamido)hexanoic acid hydrochloride

(2S)-6-amino-2-(dimethylamino)hexanoic acid dihydrochloride

(2S)-6-amino-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-6-amino-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid hydrochloride

(2S)-6-amino-2-acetamidohexanoic acid

(2S)-6-amino-2-hydroxyhexanoic acid hydrochloride

(2S)-6-amino-2-{[(tert-butoxy)carbonyl]amino}hexanoic acid

(2S)-6-azido-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-6-chloro-4-oxo-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid

(2S)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid

(2S)-6-methoxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid

(2S)-6-nitro-2,3-dihydro-1H-indole-2-carboxylic acid

(2S)-6-{[(benzyloxy)carbonyl]amino}-2-{[(tert-butoxy)carbonyl]amino}hexanoic acid

(2S)-6-{[(tert-butoxy)carbonyl]amino}-2-(dimethylamino)hexanoic acid

(2S)-6-{[(tert-butoxy)carbonyl]amino}-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-6-{[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl]amino}-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-azepane-2-carboxylic acid hydrochloride

(2S)-azetidine-2-carboxylic acid

(2S)-bicyclo[2.2.2]octan-2-amine hydrochloride

(2S)-bicyclo[2.2.2]octane-2-carboxylic acid

(2S)-but-3-en-2-amine

(2S)-but-3-yn-2-amine hydrochloride

(2S)-but-3-yn-2-ol

(2S)-butan-2-amine

(2S)-butan-2-ol

(2S)-butan-2-yl methanesulfonate

(2S)-butane-1,2,4-triol

(2S)-butane-1,2-diol

(2S)-hex-5-en-2-ol

(2S)-morpholine-2-carboxamide hydrochloride

(2S)-morpholine-2-carboxylic acid hydrochloride

(2S)-N,N-dimethyl-2-(methylamino)propanamide hydrochloride

(2S)-N,N-dimethylpyrrolidine-2-carboxamide