Ethyl 2-(hydroxymethyl)-4,4-dimethylpentanoate

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanoyl]-3-azabicyclo[3.1.0]hexane-1-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanamido]cyclobutane-1-carboxylic acid

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

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(methoxymethyl)propanamido]cyclobutane-1-carboxylic acid

2-[N-(butan-2-yl)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido]acetic acid

(2S)-2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}-4-methylpentanoic acid

(2S,3S)-2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}-3-methylpentanoic acid

(1RS&,3SR&)-3-{2-[(1RS,2SR)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}cyclopentane-1-carboxylic acid

3-(N-ethyl-1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,2-oxazol-4-yl}formamido)-2-methylpropanoic acid

3-(N-ethyl-1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,2-oxazol-4-yl}formamido)butanoic acid