1-(2-Bromo-3-fluorophenyl)cyclopentane-1-carboxylic acid

2-{Bicyclo[2.2.1]heptan-2-yl}-2-(2,2,2-trifluoroacetamido)acetic acid

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

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

(2S)-3-(dimethylamino)-2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methoxypropanamido]propanoic acid

2-{Spiro[3.3]heptan-2-yl}-2-(2,2,2-trifluoroacetamido)acetic acid

(2S)-3-(dimethylamino)-2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]acetamido}propanoic acid

2-(Trifluoroacetyl)-2-azaspiro[4.4]nonane-4-carboxylic acid

4-(2,2,2-Trifluoroacetyl)-4-azabicyclo[6.1.0]nonane-8-carboxylic acid

(2S)-3-(dimethylamino)-2-{[(1RS,2SR)-2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopentyl]formamido}propanoic acid

4-(dimethylamino)-2-{2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropyl]acetamido}butanoic acid