2-(2-{[(9H-fluoren-9-yl)methoxy]carbonyl}-5-oxa-2-azaspiro[3.5]nonan-6-yl)acetic acid

1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 1-methyl-5-oxo-1H,4H,5H-pyrazolo[4,3-b]pyridine-6-carboxylate

1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 8-{[(tert-butoxy)carbonyl]amino}-6,7,8,9-tetrahydro-5H-benzo[7]annulene-2-carboxylate

1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 5-methyl-2-(1-methyl-1H-pyrazol-4-yl)-2H-1,2,3-triazole-4-carboxylate

2-{[3-ethoxy-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]oxy}propanoic acid

3-({3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido}methyl)oxane-3-carboxylic acid

(2S)-2-({3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]oxan-3-yl}formamido)-3-hydroxypropanoic acid

3-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]methyl}oxane-3-carboxylic acid

rac-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(3R,4R)-4-hydroxyoxan-3-yl]carbamoyl}propanoic acid

1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-octahydrocyclopenta[b]pyrrole-3a-carboxylic acid

4-(2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]sulfanyl}acetyl)-2-methylmorpholine-2-carboxylic acid