4-Amino-4-(3-hydroxy-5,5-dimethyloxolan-3-yl)-1lambda6-thiane-1,1-dione

4-[2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]pentanoic acid

3-{[2-(dimethylcarbamoyl)ethyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

4-(2,3-dimethylpiperidin-1-yl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoic acid

(2S)-2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]-4-(methylsulfanyl)butanoic acid

(2S)-2-{[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylcyclohexyl]formamido}propanoic acid

(2R)-2-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1H-1,2,4-triazol-3-yl]formamido}-4-(methylsulfanyl)butanoic acid

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

3-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylhexanamido]-2-hydroxy-2-methylpropanoic acid

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

2-{1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]cyclopentyl}acetic acid