4H-1-Benzopyran-4-one, 6-[5-(3,4-dihydro-5,7-dimethoxy-4-oxo-2H-1-benzopyran-2-yl)-2-methoxyphenyl]-2,3-dihydro-5,7-dimethoxy-2-(4-methoxyphenyl)- AIDS-155559 AIDS155559 Robustaflavone hexamethyl ether