N,N,4-trimethylpiperidin-4-amine dihydrochloride

(2R)-2-{2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]propanamido}propanoic acid

(2S)-2-{2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]propanamido}propanoic acid

1-{2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]propanoyl}azetidine-3-carboxylic acid

2-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]-N-methylformamido}butanoic acid

4-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]-N-methylformamido}butanoic acid

4-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}but-2-enoic acid

4-({6-benzyl-6-azabicyclo[3.2.1]octan-3-yl}carbamoyl)-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

3-({6-benzyl-6-azabicyclo[3.2.1]octan-3-yl}carbamoyl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(1-methylazepan-4-yl)carbamoyl]propanoic acid

3-{[2-(5-bromo-1-methyl-1H-imidazol-4-yl)ethyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid