4-(2-Amino-2-oxoethyl)-3-thiophenecarboxylic acid

6-{[(9H-fluoren-9-yl)methoxy]carbonyl}-4-hydroxy-5,6,7,8-tetrahydro-1,6-naphthyridine-3-carboxylic acid

5-(4-{[(9H-fluoren-9-yl)methoxy]carbonyl}morpholin-3-yl)-1-methyl-1H-pyrrole-2-carboxylic acid

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

5-{2-azabicyclo[2.2.2]octan-2-yl}-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-oxopentanoic acid

rac-5-{[(2R,3R)-3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]oxolan-2-yl]formamido}pentanoic acid

rac-4-{[(1R,2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cycloheptyl]formamido}pentanoic acid

rac-(1R,5S)-5-[3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]cyclohex-3-ene-1-carboxylic acid

2-[N-benzyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]acetic acid

1-[(2R,3S)-3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]cycloheptane-1-carboxylic acid

(3S)-3-hydroxy-3-[4-(methoxycarbonyl)-1-methyl-1H-pyrazol-5-yl]propanoic acid