THE QUATERNARY ALKLOID OF RAUWOLFIA VERTICILLATA (LOUR.) BAILL VAR. HAINANENSIS TSIANG.——STUDIES ON THE STRUCTURE OF MACROSPEGATRINE

A new bis-indolo alkaloid, macrospegatrine isolated from the water soluble fraction of the roots of the title species of Rauwolfia was shown to have the molecular formula C₄₀H₄₆N₄O₃Cl₂. On the basis of UV, IR, MS and NMR spectroscopic data evidence, particularly X-ray crystallographic analysis, structure 1 has been assigned to this alkaloid.