The structure of channaine (3), derived by spectral and single-crystal X-ray analyses, indicates that this alkaloid is probably an artefact which arises from the condensation of a pair of N-demethylmesembrenone (4) molecules during the isolation process.
A. Abou-Donia, P. W. Jeffs, A. T. McPhail and R. W. Miller, J. Chem. Soc., Chem. Commun., 1978, 1078 DOI: 10.1039/C39780001078
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