6,7,8,9-Tetrahydro-2-methyl-1H-benz[g]indole

3-cyclopropyl-4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbut-2-enamido]butanoic acid

3-[N-benzyl-2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]propanoic acid

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

3-{N-benzyl-2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetamido}propanoic acid

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

rac-4-{1-[(2R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-2-yl]-N-(propan-2-yl)formamido}butanoic acid

rac-3-{N-tert-butyl-1-[(2R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-2-yl]formamido}propanoic acid

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

(2S)-3-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]acetamido}-2-hydroxypropanoic acid

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