1-(5-Oxopyrrolidin-3-yl)piperazin-2-one;hydrochloride

2-({[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazol-3-yl]formamido}oxy)-3-methoxypropanoic acid

(2S,4S)-1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazole-5-carbonyl]-4-hydroxypyrrolidine-2-carboxylic acid

(2S)-2-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazol-5-yl]formamido}-4-methylpentanoic acid

3-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazol-3-yl]formamido}hexanoic acid

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

4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]-5-oxopyrrolidine-3-carboxylic acid

4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxybutanamido]-5-oxopyrrolidine-3-carboxylic acid

4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]-5-oxopyrrolidine-3-carboxylic acid

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

(2S,3R)-3-(benzyloxy)-2-[3-cyclopropyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-difluoropropanamido]butanoic acid