N-cyclopropyl-5-methyl-5-azaspiro[2.3]hexan-1-amine

3-{1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-2-yl]-N-(propan-2-yl)formamido}propanoic acid

(3R)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanoyl]piperidine-3-carboxylic acid

(3S)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanoyl]piperidine-3-carboxylic acid

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanamido]cyclopentane-1-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanamido]cyclopentane-1-carboxylic acid

2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanamido]methyl}pentanoic acid

2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanamido]methyl}-3-methylbutanoic acid

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

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(2-methylpyridin-4-yl)methyl]carbamoyl}propanoic acid

rac-(1R,2S)-2-{5-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,2-oxazole-3-amido}cyclopentane-1-carboxylic acid