Norditerpenoid alkaloids from Consolida orientalis and complete 1H and 13C NMR signal assignments of some lycoctonine-type alkaloids

J Nat Prod. 2002 Jul;65(7):1069-72. doi: 10.1021/np020026z.

Abstract

A new norditerpene alkaloid was isolated, 18-demethylpubescenine (1), in addition to four known compounds, 14-demethyltuguaconitine (2), takaosamine (3), gigactonine (4), and delcosine (5), from fresh, whole plants of Consolida orientalis. The structure of 1 was established by spectroscopic methods, including various 2D NMR techniques and HRESIMS. As a result of a detailed NMR study, complete 1H NMR chemical shift assignments for alkaloids 1-5 are presented herein, and some 13C NMR signal assignments for 2-4 have been revised.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkaloids / chemistry
  • Alkaloids / isolation & purification*
  • Diterpenes / chemistry
  • Diterpenes / isolation & purification*
  • Hungary
  • Molecular Conformation
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Plants, Medicinal / chemistry*
  • Spectrophotometry, Ultraviolet

Substances

  • 14-demethyltuguaconitine
  • 18-demethylpubescenine
  • Alkaloids
  • Diterpenes
  • gigactonine
  • takaosamine