Suggested Reaction 1.14.11.-

Left

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

Right

3,4',5,7-tetrahydroxyflavone
+CO2
+Butanedionic acid
+H+

[BiSSCat | GREP ]