2-(Ethyl(methyl)amino)-2-phenylacetic acid

4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-[(3S)-3-hydroxypiperidin-1-yl]-5-oxopentanoic acid

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]-2-(methoxymethyl)butanoic acid

(2S,3R)-2-{2-[1-benzyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)piperidin-4-yl]acetamido}-3-hydroxybutanoic acid

2-(N-ethyl-1-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyrimidin-5-yl}formamido)acetic acid

2-ethyl-2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]formamido}butanoic acid

4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2,5-oxadiazole-3-amido]-3-methyloxolane-3-carboxylic acid

4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methylhex-5-enamido]oxolane-3-carboxylic acid

3-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-1,3-thiazol-5-yl]formamido}-2-hydroxy-2-methylpropanoic acid

Methyl 2-(2-cyclopentyl-2-oxoethyl)-4-methyl-3-oxopentanoate

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