Chemistry of Natural Compounds

, Volume 20, Issue 4, pp 454–467 | Cite as

Use of the method of metastable defocusing for the analysis of the processes involved in the fragmentation of lycoctonine bases

  • Ya. V. Rashkes
  • M. S. Yunusov


The metastable transitions in the mass spectra of 21 lycoctonine bases have been studied by the method of metastable defocusing (MD). It has been established that as a criterion of the monotypicity of single-stage fragmentation reactions it is possible to use a linear dependence of the relative intensities of the metastable peaks (MPs) on the stability of the daughter ion. In the MD spectra of the ions formed in several stages, to characterize the generality of the breakdown reactions, in addition to the intensities of the MPs, the accurate positions of their maxima and the general shape of the curve are important.


Epoxy Basis Lycoctonine Aporphine Alkaloid Talatisamine Lycoctonine Skeleton 


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Copyright information

© Plenum Publishing Corporation 1985

Authors and Affiliations

  • Ya. V. Rashkes
  • M. S. Yunusov

There are no affiliations available

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