Answers are grounded in this paper and cite their sources.
A compound, which accumulates when tryptamine (I) and secologanin (II) are incubated with an enzyme preparation from Catharanthus roseus cell suspension cultures, was identified as 20,21-didehydroajmalicine (cathenamine)(IVa), and was shown to be a central intermediate in the enzymatic production of ajmalicine (Va),19-epi-ajmalicine (Vb) and tetrahydroalstonine (Vc).
No takes yet. Share an insight, caveat, or question.
Stöckigt et al. (1977) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: