3-(tert-Butyl)picolinaldehyde

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

2-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentanecarbonyl]azetidin-3-yl}propanoic acid

rac-(2R,3S)-3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-enamido]oxolane-2-carboxylic acid

2-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]cyclopentyl}acetic acid

rac-(2R,3S)-3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)furan-2-amido]oxolane-2-carboxylic acid

(2RS,3SR)-3-{2-[(1RS&,2SR&)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}oxolane-2-carboxylic acid

rac-(2R,3S)-3-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,2-oxazole-4-amido}oxolane-2-carboxylic acid

3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]oxolane-2-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-ynamido]oxolane-2-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-enamido]oxolane-2-carboxylic acid