4'-O-Methylochnaflavone 49619-87-6 4H-1-Benzopyran-4-one, 2-[4-[5-(5,7-dihydroxy-4-oxo-4H-1-benzopyran-2-yl)-2-methoxyphenoxy]phenyl]-5,7-dihydroxy- AIDS-016688 AIDS016688 NSC363258