7-ethyl-3,4,9-trimethyl-1-[(4-methylphenyl)methyl]-5a,9a,10,10a-tetrahydro-4H-purino[8,7-c][1,2,4]triazine-6,8-dione

rac-2-{[(1R,3S)-3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropyl]formamido}hex-5-enoic acid

3-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropaneamido}-4-fluorobenzoic acid

(2S)-2-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}formamido)hexanoic acid

3-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}formamido)hexanoic acid

2-[({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}formamido)methyl]-2-methylbutanoic acid

6-[(Benzyloxy)carbonyl]-6-azaspiro[3.5]nonane-8-carboxylic acid

5-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}formamido)-2-methylpentanoic acid

2-{3-[3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]cyclobutyl}acetic acid

1H-1,2,3-benzotriazole-5-sulfonyl fluoride

3-{[2-(1-benzyl-4-hydroxypiperidin-4-yl)ethyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid