8-(hydroxymethyl)-3-methyl-7H-purine-2,6-dione

2-辛基硫基乙酸

2-棕榈酰氧基乙酸

[2-(4-bromophenyl)-2-oxoethyl] 2-hydroxyacetate

2-[2-(carboxymethoxy)-2-oxoethoxy]acetic acid