(2-Methyl-5,6,7,8-tetrahydro-benzo[4,5]thieno[2,3- d ]pyrimidin-4-ylamino)-acetic acid

2-(2-Amino-thiazol-4-yl)-benzoic acid

(5-Amino-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-acetic acid

4-(1 H -Benzoimidazol-2-yl)-butyric acid

3-(2-amino-benzothiazol-6-yl)-propionic acid

(R)-2-Benzo[1,3]dioxol-5-yl-thiazolidine-4-carboxylic acid

7-Naphthalen-2-yl-pyrazolo[1,5- a ]pyrimidine-2-carboxylic acid

5-(3,5-Dimethyl-1 H -pyrazol-4-ylmethyl)-furan-2-carboxylic acid

3-(1-Ethyl-3-methyl-1 H -pyrazol-4-yl)-4,5-dihydro-isoxazole-5-carboxylic acid

3-(2-Fluoro-phenyl)-4,5-dihydro-isoxazole-5-carboxylic acid

3,6-Dimethyl-1-phenyl-1 H -pyrazolo[3,4- b ]pyridine-4-carboxylic acid