2,5-di(piperidin-1-yl)cyclohexa-2,5-diene-1,4-dione

acetic acid,benzene-1,2,4,5-tetrol

3-(4-Pyridyl)-1,2,4,5-benzenetetrol Tetraacetate

3-(9-Acridyl)-1,2,4,5-benzenetetrol Tetraacetate

dipotassium,3,6-dioxocyclohexa-1,4-diene-1,4-diolate