2,3,5,6-Tetrahydroxy-p-benzoquinone 2,5-Cyclohexadiene-1,4-dione, 2,3,5,6-tetrahydroxy- 319-89-1 HPEK-1 Kelox NSC112931 THQ Terasin Tetrahydroxy-1,4-benzoquinone Tetrahydroxy-p-benzoquinone Tetrahydroxy-p-quinone Tetrahydroxyparabenzoquinone Tetrahydroxyquinone Tetroquinone p-Benzoquinone, 2,3,5,6-tetrahydroxy-