五氧化二碘

顺式-二苯乙烯

反式-1,2-二苯乙烯

2-[4-(2-carboxyphenyl)-2,5-dihydroxy-3,6-dioxocyclohexa-1,4-dien-1-yl]benzoic acid

5,5'-dihydroxy-3,6,3',6'-tetraiodo-2,2'-oxy-di-[1,4]benzoquinone