(2S)-4-aminobutan-2-ol

(2S)-4-azido-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

(2S)-4-bromobutan-2-amine hydrobromide

(2S)-4-carbamoyl-2-(2-acetamido-3-methylbutanamido)butanoic acid

(2S)-4-carbamoyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanoic acid

(2S)-4-carbamoyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

(2S)-4-carbamoyl-2-acetamidobutanoic acid

(2S)-4-carbamoyl-2-decanamidobutanoic acid

(2S)-4-carbamoyl-2-dodecanamidobutanoic acid

(2S)-4-carbamoyl-2-[(2R)-2-hydroxypropanamido]butanoic acid

(2S)-4-carbamoyl-2-[(2S)-2-hydroxypropanamido]butanoic acid

(2S)-4-carbamoyl-2-[2-(4-cyclobutylphenyl)acetamido]butanoic acid

(2S)-4-carbamoyl-2-[2-(4-cyclohexylphenyl)acetamido]butanoic acid

(2S)-4-chlorobutan-2-amine hydrochloride

(2S)-4-cyclohexyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

(2S)-4-ethoxy-2-methyl-4-oxobutanoic acid

(2S)-4-ethoxybutan-2-amine hydrochloride

(2S)-4-ethylhexan-2-amine hydrochloride

(2S)-4-fluorobutan-2-ol

(2S)-4-fluorobutane-1,2-diol

(2S)-4-hydroxy-2-(methylamino)butanoic acid hydrochloride

(2S)-4-hydroxy-2-(trimethylazaniumyl)butanoate

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

(2S)-4-methoxybutan-2-amine hydrochloride

(2S)-4-methoxybutan-2-ol

(2S)-4-methoxybutane-1,2-diol

(2S)-4-methyl-1-(pyrrolidin-1-yl)pentan-2-amine

(2S)-4-methyl-2-(3,3,3-trifluoropropanamido)pentanoic acid

(2S)-4-methyl-2-(4-methylbenzenesulfonamido)pentanoic acid

(2S)-4-methyl-2-(4-phenylbutanamido)pentanoic acid

(2S)-4-methyl-2-(methylamino)pentan-1-ol

(2S)-4-methyl-2-(methylamino)pentanamide hydrochloride

(2S)-4-methyl-2-(methylamino)pentanoic acid

(2S)-4-methyl-2-[(2,2,2-trifluoroethyl)amino]pentanoic acid

(2S)-4-methyl-2-{[(2S)-5-oxopyrrolidin-2-yl]formamido}pentanoic acid

(2S)-4-methyl-2-{[(propan-2-yloxy)carbonyl]amino}pentanoic acid

(2S)-4-methylpentan-2-amine

(2S)-4-methylpentan-2-amine hydrochloride

(2S)-4-methylpentan-2-ol

(2S)-4-oxo-1,2,3,4-tetrahydroquinoline-2-carboxylic acid hydrobromide

(2S)-4-oxoazetidine-2-carboxylic acid

(2S)-4-phenoxybutan-2-amine hydrochloride

(2S)-4-phenylbut-3-en-2-ol

(2S)-4-phenylbutan-2-amine hydrochloride

(2S)-4-phenylbutan-2-ol