3-Chloro-6-iodobenzo[d]isoxazole

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

4-[3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-3-fluorobenzoic acid

1-{2-[3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]ethyl}-1H-imidazole-4-carboxylic acid

2-[(2S)-3-(benzyl carboxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-3-hydroxy-2-methylpropanoic acid

2-[(2S)-3-(tert-butoxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-3-hydroxy-2-methylpropanoic acid

2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-3-hydroxy-2-methylpropanoic acid

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

2-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}hex-5-enoic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hex-5-enamido]-3-methylbutanoic acid

2-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]pentanamido}hex-5-enoic acid