3-(Azetidin-3-yloxy)isoxazole

(1rs,3rs)-3-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]cyclobutane-1-carboxylic acid

(2S,3R)-2-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-3-methoxybutanoic acid

(1RS,2RS,4SR)-7-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoyl]-7-azabicyclo[2.2.1]heptane-2-carboxylic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[4-hydroxy-3-(hydroxymethyl)piperidin-1-yl]-4-oxobutanoic acid

4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-{1H,4H,5H,6H,7H-imidazo[4,5-c]pyridin-5-yl}-5-oxopentanoic acid

3-{[(4,6-dimethylpyridin-3-yl)methyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

1-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentanecarbonyl]-6-methylpiperidine-3-carboxylic acid

1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolane-3-carbonyl]-6-methylpiperidine-3-carboxylic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]-6-methylpiperidine-3-carboxylic acid

1-{2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropyl]acetyl}-3-methylpiperidine-4-carboxylic acid