Suggested Reaction 1.17.4.-

Left

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

Right

3,4',5,7-tetrahydroxyflavone
+Reduced thioredoxin

[BiSSCat | GREP ]