Scheme 2.
Biosynthesis of ajmaline indole alkaloids. (SB) Sarpagan bridge enzyme; polyneuridine aldehyde reductase (PNAE), vinorine synthase (VS), vinorine hydroxylase (VH), vomilenine reductase (VR), dihydrovomilenine reductase (DHVR) 17-O-acetyl-ajmalanesterase (AAE), norajmaline-N-methyltransferase (NMT).
