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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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Lim et al. (2007) studied this question.
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