Secoleuconoxine and Oxopericine Derivatives from Kopsia

Two new indole alkaloids, viz., arboloscine (1), the first example of a secoleuconoxine, and pericidine (5), an oxidized derivative of pericine (6), were obtained as minor alkaloids from the stem-bark extract of the Malayan Kopsia species, K. arborea. Their structures were established by spectroscopic analysis.

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