5-[(3,5-Dimethylpiperidin-1-yl)(4-fluorophenyl)methyl]-[1,2,4]triazolo[3,2-b][1,3]thiazol-6-ol

2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-3-fluorobenzoic acid

2-{5-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]pyridin-2-yl}acetic acid

(2R)-2-({1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-1,2,3-triazol-4-yl}formamido)-4-hydroxybutanoic acid

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

9H-fluoren-9-ylmethyl 4-(hydroxymethyl)-2,5-dimethylpiperidine-1-carboxylate

(2R)-2-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxan-4-yl]formamido}butanoic acid

(2S)-4-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-2-hydroxybutanoic acid

(2S)-4-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]-2-hydroxybutanoic acid

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

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxybutanamido]pent-4-ynoic acid