Suggested Reaction 1.1.4.-

Left

3,5,7,9,11,13,15-Heptaoxo-hexadecanoyl-[acp]
+1,4-Dithiothreitol

Right

3,5,7,11,13,15-Heptaoxo-9-hydroxy-hexadecanoyl-[acp]
+Oxidized dithiothreitol

[BiSSCat | GREP ]