(E)-4-(4-硝基苯基)-4-氧代-2-丁烯酸

2-[(2-chloroacetyl)amino]-2-hydroxyacetic acid

2-乙酰氨基-2-(2,5-二甲基苯基)乙酸

(2,5-二氧代咪唑烷-4-亚基)乙酸

2-(ethylamino)acetic acid,hydrochloride