Suggested Reaction 3.3.2.-

Left

9-Hydroxy-3,5,7,11,13,15,17,19-nonaoxo-henicosanoyl-[acp]
+H2O

Right

9-Hydroxy-3,5,7,11,13,15,17,19-nonaoxo-eicosanoyl-[acp]
+Methanol

[BiSSCat | GREP ]