Rel-(4R,5S)-4-amino-5-phenylpyrrolidin-2-one

3-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-4-iodobenzoic acid

2-[2-(cyclopropylmethyl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

2-[1-benzyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyrrolidine-3-carbonyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

5-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-dimethylpropanamido]-1-methyl-1H-pyrazole-4-carboxylic acid

4-[7-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)heptanamido]-2-methylbut-2-enoic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-enoyl]-5-hydroxypiperidine-3-carboxylic acid

1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanoyl]-5-hydroxypiperidine-3-carboxylic acid

1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanoyl]-5-hydroxypiperidine-3-carboxylic acid

1-{3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]propanoyl}-1,2,3,6-tetrahydropyridine-4-carboxylic acid

3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-4,4,4-trifluorobutanoic acid