5-hippuryl-2,2-dimethyl-1,3-dioxane-4,6-dione

3-氯苯甲酸

2-amino-3-(2,5-dihydroxyphenyl)propanoic acid

N-(2-hydrazinyl-2-oxoethyl)benzamide

2-(2-benzamidoacetyl)sulfanylacetic acid