2-methyl-4,6a-dihydro-3aH-furo[3,2-b]pyrrole-5-carboxylic acid

2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolane-3-carbonyl]thiomorpholin-3-yl}acetic acid

1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-1,2,3,4-tetrahydroquinoline-6-carboxylic acid

2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropaneamido]-5-iodobenzoic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(4-methylcyclohexyl)methyl]carbamoyl}propanoic acid

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

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

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

rac-3-({[(2R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-2-yl]formamido}methyl)-4-methylpentanoic acid

rac-4-[(2R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolane-2-carbonyl]-1,4-oxazepane-6-carboxylic acid

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