1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 7-methoxy-5H,6H,7H,8H-imidazo[1,2-a]pyridine-2-carboxylate

(2S)-2-{2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxan-4-yl]-N-methylacetamido}propanoic acid

4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-methylhexanamido]but-2-ynoic acid

(2S)-3-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-fluorophenyl]formamido}-2-hydroxypropanoic acid

(2R)-1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanoyl]-2-methylpyrrolidine-2-carboxylic acid

(2R)-1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-difluoropropanoyl]-2-methylpyrrolidine-2-carboxylic acid

(2R)-1-[3-cyclopropyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-2-methylpyrrolidine-2-carboxylic acid

2-({3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-5-methylhexanamido}oxy)propanoic acid

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

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

2-(2-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)bicyclo[3.1.0]hexan-1-yl]formamido}acetamido)acetic acid