Suggested Reaction 1.17.3.-

Left

1-Benzopyrylium, 3,5,7-trihydroxy-2-(3,4,5-trihydroxyphenyl)-, chloride
+H2O
+O2

Right

3,5,7,3',4',5'-Hexahydroxyflavone
+H2O2

[BiSSCat | GREP ]