9-(5-hydroxy-8,10-dimethoxy-2-methyl-4-oxo-4H-naphtho(1,2-b)pyran-6-yl)-5-hydroxy-6,8-dimethoxy-2-methyl-4H-naphtho(2,3-b)pyran-4-one
9-(5-hydroxy-8,10-dimethoxy-2-methyl-4-oxo-4h-naphtho(1,2-b)pyran-6-yl)-5-hydroxy-6,8-dimethoxy-2-methyl-4h-naphtho(2,3-b)pyran-4-one