4,4',5,7',8-pentahydroxy-1,1'-dimethoxy-6',8-dimethyl-5,6,7,8-tetrahydro(2,2'-bianthracene)-9,9',10,10'-tetraone
4,4',5,7',8-pentahydroxy-1,1'-dimethoxy-6',8-dimethyl-5,6,7,8-tetrahydro(2,2'-bianthracene)-9,9',10,10'-tetraone