2-[(3-chloro-1,4-dioxonaphthalen-2-yl)amino]acetic acid

2-[[3-hydroxy-5-(hydroxymethyl)-2-methylpyridin-4-yl]methylamino]acetic acid

(4-乙氧基苯甲酰基氨基)-乙酸

2-[(4-propoxybenzoyl)amino]acetic acid

(4-丁氧基-苯甲酰基氨基)-乙酸