Suggested Reaction 1.14.11.-

Left

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

Right

3,5,7,3',4',5'-Hexahydroxyflavone
+CO2
+Butanedionic acid

[BiSSCat | GREP ]