5-amino-4-hydroxynaphthalene-1,3-disulfonic acid

2-乙氧基-5-硝基苯甲醛

2-hydroxy-1,2-bis(2-hydroxyphenyl)ethanone

3-Amino-4,5-dimethylbenzolsulfonsaeure

4-amino-2,3-dimethylbenzenesulfonic acid