Suggested Reaction 1.14.16.-

Left

9,11alpha-Epoxypregn-4-ene-3,20-dione
+6,7-Dihydrobiopterin
+H2O

Right

Pregna-4,9(11)-diene-3,20-dione
+2-Amino-6-(1,2-dihydroxypropyl)-5,6,7,8-tetrahydoro-4(1H)- pteridinone
+O2
[BiSSCat | GREP ]