1-(4-Hydroxy-phenyl)-5-oxo-pyrrolidine-3-carboxylic acid

1-(4-Chloro-benzenesulfonyl)-pyrrolidine-2-carboxylic acid

2-(6-Methyl-4-oxo-1,4-dihydro-pyrimidin-2-ylsulfanyl)-propionic acid

(5-Oxo-2- p -tolyl-cyclopent-1-enyl)-acetic acid

2-Methoxy-5-(morpholine-4-sulfonyl)-benzoic acid

2-(2-Oxo-pyrrolidin-1-yl)-propionic acid

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

2-Isobutyl-quinoline-4-carboxylic acid

2-(4-Oxo-4 H -quinazolin-3-yl)-propionic acid

2-(4-氧代-4 H-喹唑啉-3-基)-丙酸

(1-Allyl-5-oxo-2-thioxo-imidazolidin-4-yl)-acetic acid

(1-Phenyl-1 H -benzoimidazol-2-ylsulfanyl)-acetic acid

(1,4,5,6-Tetrahydro-pyrimidin-2-ylsulfanyl)-acetic acid

5-Amino-2-piperidin-1-yl-benzoic acid

(2,4-Dioxo-thiazolidin-3-yl)-acetic acid

(2,4-二氧噻唑烷-3-基)乙酸

5-Chloro-2-(2,5-dimethyl-pyrrol-1-yl)-benzoic acid