(2,2'-Bianthracene)-8,8'(5H,5'H)-dione, 6,6',7,7'-tetrahydro-1,1',5,6,6',9,9'-heptahydroxy-3,3'-dimethoxy-6,6'-dimethyl- 4-Hydroxy-flavomannin 6,6'-dimethyl ether A(1) 51995-93-8