4-[1-Hydroxy-2-(methylamino)ethyl]benzene-1,3-diol

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

(4R)-3-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetyl}-1,3-thiazolidine-4-carboxylic acid

2-{3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]cyclopentyl}acetic acid

2-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-enamido]methyl}-2-methylbutanoic acid

3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]-2-methoxypropanoic acid

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

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(5-oxopyrrolidin-3-yl)carbamoyl]propanoic acid

1-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropanecarbonyl}piperidine-3-carboxylic acid

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

4-({1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}formamido)-3-hydroxy-3-methylbutanoic acid