Suggested Reaction 1.14.13.-

Left

(E)-4-Oxobut-1-ene-1,2,4-tricarboxylate
+H2O
+NADP+

Right

2-Carboxy-2,5-dihydro-5-oxofuran-2-acetate
+NADPH
+O2
+H+
[BiSSCat | GREP ]