3-(2,3-Dioxo-1,2,3,4-tetrahydro-quinoxaline-6-sulfonyl)-propionic acid

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

5-甲基-1-丙基-1H-吡唑-4-羧酸, 5-Methyl-1-propyl-1 H -pyrazole-4-carboxylic acid

1-(4-Methoxy-benzenesulfonyl)-piperidine-2-carboxylic acid

(2-Oxo-2-piperidin-1-yl-ethylsulfanyl)-acetic acid

2-(1-Hydroxy-ethyl)-1 H -benzoimidazole-5-carboxylic acid

5-(4-Chloro-phenyl)-isoxazole-3-carboxylic acid

5-(4-氯苯基)异噁唑-3-羧酸

2-(1,1-Dioxo-tetrahydrothiophen-3-ylamino)-butyric acid

5-Oxo-1- m -tolyl-pyrrolidine-3-carboxylic acid

2-(2-ethyl-benzoimidazol-1-yl)-propionic acid

2-Isobutyl-quinoline-4-carboxylic acid

4-Benzothiazol-2-yl-butyric acid

3-Phenyl-2-(thiophene-2-sulfonamido)propionic acid

(3-Methyl-4-oxo-3,4-dihydro-phthalazin-1-yl)-acetic acid

2-(3-甲基-4-氧代-3,4-二氢酞嗪-1-基)乙酸

1-(4-Ethoxy-benzoyl)-pyrrolidine-2-carboxylic acid