Insecticidal bisindole alkaloids from leaves of Tabernaemontana divaricata 'Dwaft'
Phytochemistry(2024)
摘要
Six undescribed bisindole alkaloids, namely taberdisines A–F (1–6), were isolated from the leaves of Tabernaemontana divaricata 'Dwaft'. Among them, alkaloids 1 and 2 were the first examples of strychnos–iboga type alkaloid with both C–C linkage patterns. Alkaloid 3, a new type of aspidosperma–iboga with a furan-ring, as well as other three undescribed ones was disclosed. Their structures were elucidated by comprehensive spectroscopic analyses. Alkaloids 1 and 5 showed insecticide activity on Sf9 cell and eggs of Spodoptera frugiperda in vivo, which might explain the potential of the plants for insect resistance.
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关键词
Apocynaceae,Tabernaemontana divaricata 'Dwaft',Bisindole alkaloids,Strychnos–iboga type,Aspidosperma–iboga type,Insecticide
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