2-Chloro-6-(pyrimidin-5-yl)imidazo[1,2-b]pyridazine

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

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

3-[3-cyclopropyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-propylpropanamido]propanoic acid

4-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynoyl]azetidin-3-yl}butanoic acid

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

4-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanoyl]azetidin-3-yl}butanoic acid

rac-2-{1-[(1R,2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]-N-methylformamido}-2-methylpropanoic acid

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

3-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-N-propylpentanamido}propanoic acid

(3S)-3-({4-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]phenyl}formamido)butanoic acid