1-(1,1-Dimethylethyl) (2R)-2-(aminomethyl)propanedioate

2-(5-Methoxypyridin-2-yl)prop-2-en-1-amine

1-[(2S)-3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methylpropanamido]cyclopropane-1-carboxylic acid

(2S)-1-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoyl]-2-methylpyrrolidine-2-carboxylic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]-4,4-dimethylpyrrolidine-3-carboxylic acid

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

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

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

(3RS,4RS)-1-[(2S)-3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-3,4-dimethylpyrrolidine-3-carboxylic acid

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

1-[(2S)-3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-4-methylpyrrolidine-3-carboxylic acid