4-(1,1,2-Trifluoroethoxymethyl)piperidine

3-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoyl]-3-azabicyclo[4.1.0]heptane-7-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-4,4-difluorobutanoic acid

(2R)-2-({3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropyl}formamido)pentanoic acid

2-({[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-fluorophenyl]formamido}methyl)cyclopropane-1-carboxylic acid

(3S)-3-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylhexanamido]-4-methylpentanoic acid

N-ethyl-3-(nitromethyl)benzamide

(2S,3R)-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-3-methoxybutanoic acid

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

4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanamido]-3-methylbutanoic acid

(2R)-1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylpentanoyl]-4,4-difluoropyrrolidine-2-carboxylic acid