α,α'-dibromo-2,2'-dimethoxy-4,4'-dinitro-bibenzyl

4-acetamido-5-bromo-2-hydroxybenzoic acid

4,4'-diamino-5,5'-dibromo-2,2'-dihydroxy-benzil

2,2'-dihydroxy-4,4'-dinitro-benzil

4-乙酰氨基-2-乙酰氧基苯甲酸