3a(2)H-Cycloprop[2,3]androst-2-ene, dihydro-

4-({2-[cyclopropyl(ethyl)amino]ethyl}carbamoyl)-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

3-({2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]phenyl}formamido)-2-hydroxypropanoic acid

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

(2S)-4-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)furan-2-yl]formamido}-2-hydroxybutanoic acid

5-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)furan-2-amido]-3-methyl-1,2-thiazole-4-carboxylic acid

5-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)furan-2-amido]pyridine-2-carboxylic acid

3-{[(2,5-dimethyloxolan-3-yl)methyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

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

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

(2S,4S)-1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-dimethylpropanoyl]-4-hydroxypyrrolidine-2-carboxylic acid