4-Oxo-4-(3-oxo-3,4-dihydro-2 H -quinoxalin-1-yl)-butyric acid

4-Oxo-3,4-dihydro-phthalazine-1-carboxylic acid

3-(Benzo[c][1,2,5]thiadiazole-4-sulfonamido)propionic acid

3-Amino-4-piperidin-1-yl-benzoic acid

[3-(4-Hydroxy-phenyl)-2,4-dioxo-thiazolidin-5-yl]-acetic acid

Benzotriazol-2-yl-acetic acid

2-(1 H -Benzoimidazol-2-ylsulfanyl)-propionic acid

(Quinolin-2-ylsulfanyl)-acetic acid

(Pyridin-2-ylsulfanyl)-acetic acid

4-[(Furan-2-ylmethyl)-sulfamoyl]-benzoic acid

(2- sec -Butylsulfanyl-benzoimidazol-1-yl)-acetic acid