(6R)-6-(4-Fluorophenyl)-4-[(1R)-1-phenylethyl]morpholin-3-one

3-({[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]formamido}methyl)cyclohexane-1-carboxylic acid

rac-(3R,5R)-5-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxypropanamido]methyl}oxolane-3-carboxylic acid

rac-(3R,5R)-5-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methoxypropanamido]methyl}oxolane-3-carboxylic acid

rac-(3R,5R)-5-({[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1H-1,2,4-triazol-3-yl]formamido}methyl)oxolane-3-carboxylic acid

rac-(3R,5R)-5-({[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2,5-oxadiazol-3-yl]formamido}methyl)oxolane-3-carboxylic acid

(3RS,5RS)-5-{[(2S)-3-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}oxolane-3-carboxylic acid

rac-(3R,5R)-5-{[2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}oxolane-3-carboxylic acid

rac-5-[(1R,2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentaneamido]cyclohex-3-ene-1-carboxylic acid

5-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanamido]cyclohex-3-ene-1-carboxylic acid

5-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopent-1-ene-1-amido]cyclohex-3-ene-1-carboxylic acid