Suggested Reaction 1.1.4.-

Left

11beta,17alpha,21-Trihydroxy-5beta-pregnane-3,20-dione
+1,4-Dithiothreitol

Right

5beta-Pregnane-3alpha,11beta,17alpha,21-tetrol-20-one
+Oxidized dithiothreitol

[BiSSCat | GREP ]