Robustaflavone

4',4''',5,5'',7,7''-Hexahydroxy-3',6''-biflavone

6-[5-(5,7-Dihydroxy-4-oxo-4H-1-benzopyran-2-yl)-2-hydroxyphenyl]-5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one

2-(4-Hydroxyphenyl)-5,7-dihydroxy-6-[2-hydroxy-5-(5,7-dihydroxy-4-oxo-4H-1-benzopyran-2-yl)phenyl]-4H-1-benzopyran-4-one