3-[4-(3-{[(Tert-butoxy)carbonyl]amino}propyl)piperazin-1-yl]propanoic acid

3-{[1-(1,1-dioxo-1lambda6-thiolan-3-yl)ethyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

3-{[(1,1-dioxo-1lambda6-thian-4-yl)methyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

rac-5-[(1R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentaneamido]pyridine-3-carboxylic acid

rac-2-[N-(butan-2-yl)-1-[(1R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido]acetic acid

(2S)-2-{[(1RS,3SR)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}-3,3-dimethylbutanoic acid

rac-2-{[(1R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}-2-methylpentanoic acid

(2S,3S)-2-{[(1RS,3SR)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}-3-methylpentanoic acid

(1RS&,2SR&)-2-({[(1RS,3SR)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}methyl)cyclopentane-1-carboxylic acid

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

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