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DOI: 10.1055/s-2006-961425
© Georg Thieme Verlag Stuttgart · New York
Zur NMR-Spektroskopie von N-Acylaporphin-Alkaloiden aus Tinospora crispa
NMR-Assignments of N-Acylaporphine Alkaloids from Tinospora crispaPublikationsverlauf
1991
Publikationsdatum:
05. Januar 2007 (online)
Abstract
N-Formylannonaine (1), N-formylnornuciferine (2) and N-acetylnornuciferin (3), have been isolated from stems of Tinospora crispa (Menispermaceae), and their NMR-spectra have been fully assigned by 2D-NMR experiments. This is the first reported occurrence of N-formyl- and N-acetylaporphines from the genus Tinospora.
Key words
Tinospora crispa - Menispermaceae - aporphine alkaloids - N-formylannonaine - N-formylnornuciferine - N-acetylnornuciferine - NMR-assignments - conformational equilibrium of N-acylaporphines