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3-{[(4-Chlorophenyl)sulfonyl]amino}propanoic acid

3-{[(4-Chlorophenyl)thio]methyl}benzoic acid

3-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}-5-hydroxybenzoic acid

3-{[(Allyloxy)carbonyl]amino}-5-hydroxybenzoic acid

3-{[(Benzylamino)carbonyl]amino}propanoic acid

3-{2-[4-(Tert-butyl)phenoxy]-5-nitrophenyl}acrylic acid

3-{4-[(Diethylamino)sulfonyl]phenyl}propanoic acid

3-{4-[(Trifluoromethyl)thio]phenyl}acrylic acid

3-(3-(2-Bromoacetamido)propylcarbamoyl)-proxyl

3-4-(2-Hydroxy-ethoxy)-phenyl-acrylic acid

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