Suggested Reaction 1.3.4.-

Left

5-(3'-Carboxy-3'-oxopropenyl)-4,6-dihydroxypicolinate
+1,4-Dithiothreitol

Right

5-(3'-Carboxy-3'-oxopropyl)-4,6-dihydroxypicolinate
+Oxidized dithiothreitol

[BiSSCat | GREP ]