Suggested Reaction 1.17.4.-

Left

3,5,7-Trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-benzopyrylium chloride
+H2O
+Oxidized dithiothreitol

Right

3-Methylquercetin
+1,4-Dithiothreitol

[BiSSCat | GREP ]