4,4,4-Trifluoro-2-methanesulfonyl-3-oxobutanenitrile

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

Methyl 6-oxo-2-propyl-1,6-dihydropyrimidine-5-carboxylate

3-[3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]oxolane-2-carboxylic acid

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

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

1-[(Benzyloxy)carbonyl]-1-azaspiro[4.4]nonane-4-carboxylic acid

rac-2-[(2R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolane-2-carbonyl]-4-methyl-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

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

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

rac-2-[(2-{[(2R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-2-yl]formamido}ethyl)sulfanyl]acetic acid