7-[(2-Chlorophenyl)methyl]-8-[(4-chlorophenyl)methylsulfanyl]-3-methyl-4,5-dihydropurine-2,6-dione

3-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hex-5-enoyl]pyrrolidin-3-yl}propanoic acid

(2R)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(methoxymethyl)butanoyl]pyrrolidine-2-carboxylic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-dimethylpentanamido]-3-hydroxy-2-methylpropanoic acid

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

2-[(2S)-3-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-3,3,3-trifluoro-2-methylpropanoic acid

3-{N-ethyl-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}butanoic acid

5-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropanecarbonyl]-4H,5H,6H,7H-thieno[3,2-c]pyridine-4-carboxylic acid

2-{1-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylhexanoyl]pyrrolidin-2-yl}acetic acid

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

4-[(1,4-dioxepan-6-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid