2,4,6(1H,3H,5H)-Pyrimidinetrione,5,5′-[[1,1′,6,6′,7,7′-hexahydroxy-3,3′-dimethyl-5,5′-bis(1-methylethyl)[2,2′-binaphthalene]-8,8′-diyl]dimethylidyne]bis-