4H-1-Benzopyran-4-one, 5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3,6,7,8-tetramethoxy- 5,4'-Dihydroxy-3,6,7,8,3'-pentamethoxyflavone 5,4'-Dioh-3,6,7,8,3'-pmf 5-Hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3,6,7,8-tetramethoxy-4H-1-benzopyran-4-one 50439-47-9 MS/433 NSC 333051