Suggested Reaction 1.14.16.-

Left

4-Carboxy-2-hydroxyhexa-2,4-dienedioate
+6,7-Dihydrobiopterin
+H2O

Right

3-Carboxy-2,5-dihydro-5-oxofuran-2-acetate
+2-Amino-6-(1,2-dihydroxypropyl)-5,6,7,8-tetrahydoro-4(1H)- pteridinone
+O2
[BiSSCat | GREP ]