2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methyl-N-(prop-2-yn-1-yl)propanamido]acetic acid

1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl (3E)-hexa-3,5-dienoate

1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(3-ethyloxetan-3-yl)acetate

rac-1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl (2R,3S)-3-methyloxolane-2-carboxylate

rac-1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl (1R,2S)-2-(1H-imidazol-1-yl)cyclohexane-1-carboxylate

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

tert-butyl 3-(N-methyl2-chloropyrimidine-5-amido)azetidine-1-carboxylate

3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-dimethylpropanoyl]-3-azabicyclo[3.2.1]octane-8-carboxylic acid

2-cyclopropyl-2-({[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2-oxazol-3-yl]formamido}oxy)acetic acid

2-cyclopropyl-2-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]oxy}acetic acid

2-cyclopropyl-2-({[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methyloxolan-3-yl]formamido}oxy)acetic acid