Suggested Reaction 1.17.4.-

Left

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

Right

3,5,7,3',4',5'-Hexahydroxyflavone
+1,4-Dithiothreitol

[BiSSCat | GREP ]