2-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-(2-hydroxyethyl)-3-methylpentanamido]acetic acid

5-[(Trifluoromethyl)sulfanyl]-1,3,4-thiadiazole-2-carboxylic acid

(2S)-2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-difluorobutanamido]-4-methoxy-4-oxobutanoic acid

3-[(2S)-3-(benzyl carboxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-1-methyl-1H-pyrazole-5-carboxylic acid

(2R)-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanamido]-4-methoxy-4-oxobutanoic acid

2-[(1S)-2-{[(benzyloxy)carbonyl]amino}-1-{[(tert-butoxy)carbonyl]amino}ethyl]-1,3-oxazole-5-carboxylic acid

1,3-di-tert-butyl-1H-pyrazole-5-carboxylic acid

1-(2,2-dimethylpropyl)-3-methyl-1H-pyrazole-5-carboxylic acid

2-(3-{[(2S)-3-(benzyl carboxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}cyclobutyl)acetic acid

2-(4-Ethyl-1-hydroxycycloheptyl)-2-methylbutanoic acid

5-(1-Methylcyclopropyl)-2-(trifluoromethyl)oxolane-3-carboxylic acid