The molecule is a ring assembly compound consisting of two flaviolin units joined by a 3,8'-linkage. It derives from a flaviolin. It is a conjugate acid of a 3,8'-biflaviolin 2,2'-diolate.
4,5,7-trihydroxy-3-(2,4,5-trihydroxy-7,8-dioxonaphthalen-1-yl)naphthalene-1,2-dione