5-(1,3-benzothiazol-2-yl)-1H-imidazol-2-amine

(2S,3R)-3-(benzyloxy)-2-({3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1-methyl-1H-pyrazol-5-yl}formamido)butanoic acid

(4R)-3-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1-methyl-1H-pyrazole-5-carbonyl}-1,3-thiazolidine-4-carboxylic acid

2-(1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1-methyl-1H-pyrazole-5-carbonyl}azetidin-3-yl)acetic acid

2-ethyl-2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]butanoic acid

4-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]hexanoic acid

2-[(3R)-N-benzyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]acetic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-{2-methyl-2,6-diazaspiro[3.4]octan-6-yl}-4-oxobutanoic acid

1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-5-methylpiperidine-3-carboxylic acid

1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-5-methylpiperidine-3-carboxylic acid

3-[2-cyclobutyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]pentanoic acid