(2S,3S)-2-Hydroxy-3-[[(1S)-1-phenylethyl](phenylmethyl)amino]heptanoic acid

2-(Pentylamino)-3-[(2,4,6-trimethylphenyl)carbamoyl]propanoic acid

2-{[3-(Morpholin-4-YL)propyl]amino}-3-[(2,4,6-trimethylphenyl)carbamoyl]propanoic acid

4-(Mesitylamino)-2-(4-methylpiperazin-1-yl)-4-oxobutanoic acid

2-(Butylamino)-4-(mesitylamino)-4-oxobutanoic acid

2-((3-Isopropoxypropyl)amino)-4-(mesitylamino)-4-oxobutanoic acid

3-{[3-(Ethoxycarbonyl)-4,5,6,7-tetrahydro-1-benzothiophen-2-YL]carbamoyl}-2-[(2-hydroxyethyl)amino]propanoic acid

2-(Benzylamino)-3-{[3-(ethoxycarbonyl)-4,5,6,7-tetrahydro-1-benzothiophen-2-YL]carbamoyl}propanoic acid

4-((3-(Ethoxycarbonyl)-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)amino)-4-oxo-2-((pyridin-3-ylmethyl)amino)butanoic acid

4-((3-(Ethoxycarbonyl)-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)amino)-2-((3-hydroxypropyl)amino)-4-oxobutanoic acid

2-((3-(Dimethylamino)propyl)amino)-4-((3-(ethoxycarbonyl)-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)amino)-4-oxobutanoic acid