Alkaloids from Tabernaemontana psorocarpa.
The isolation of the alkaloids from two different samples of stem bark of Tabernaemontana psorocarpa is described. Both samples contained 16-epi-isositsirikine as the major alkaloid but differed from each other in the number and quantity of the other alkaloids. The following minor alkaloids were identified: 12-methoxy-14,15-dehydro-vincamine, vallesiachotamine, isovallesiachotamine, tetrahydroalstonine, coronaridine and voacangine.
van Beek
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Department of Pharmacognosy, Gorlaeus Laboratories, Leiden, The Netherlands.
Verpoorte
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Baerheim Svendsen
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