[1]Benzopyrano[5,4,3-cde][1]benzopyran-5,10- dione,3,8-dihydroxy-2,7-dimethoxy-

[1]Benzopyrano[5,4,3-cde][1]benzopyran-5,10- dione,3,8-dihydroxy-2,7-dimethoxy- · CAS 3374-77-4