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The structure (III) proposed for the hexacyclic alkaloid, himgaline, on the basis of chemical and spectroscopic characterization was confirmed by several partial syntheses of himgaline derivatives from de-N-methylhimbadine (alkaloid G.B. 13). The biogenesis of the Galbulimima alkaloids is discussed.
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Mander et al. (1967) studied this question.
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