3-[(3-氟苯基)氨基]丙酸

3-(2-hydroxyethylamino)butanoic acid

7,7-dimethyl-3,4,6,8-tetrahydro-1H-quinoline-2,5-dione

3-(苄基磺酰基)丙酸

N-(4-溴苯基)-beta-丙氨酸