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<p>The new pyrrolizidine alkaloid helasine (<b>1</b>) and known heliotrine (<b>2</b>), lasiocarpine N-oxide (<b>3</b>), trachelanthamine (<b>4</b>), and echinatine (<b>5</b>) were isolated from the plant Heliotropium lasiocarpum. Alkaloids <b>4</b> and <b>5</b> were observed for the first time in H. lasiocarpum. The absolute configurations of isolated alkaloids <b>2</b>–<b>4</b> were established by X-ray crystal structure analyses. The insecticidal activity of the CHCl<sub>3</sub>, n-BuOH, and H<sub>2</sub>O parts of the H. lasiocarpum extract against Callosobruchus maculates and Sitophilus oryzae was examined. The CHCl<sub>3</sub> extract at a dose of 10 mg/L had the highest activity.</p>

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Pyrrolizidine Alkaloids from Heliotropium lasiocarpum and Insecticidal Activity of Their Extracts

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Kh. N. Olimova,
  • U. Kh. Kurbanov,
  • R. Ya. Okmanov,
  • B. Tashkhodzhaev,
  • N. I. Mukarramov,
  • S. M. Turaeva

摘要

The new pyrrolizidine alkaloid helasine (1) and known heliotrine (2), lasiocarpine N-oxide (3), trachelanthamine (4), and echinatine (5) were isolated from the plant Heliotropium lasiocarpum. Alkaloids 4 and 5 were observed for the first time in H. lasiocarpum. The absolute configurations of isolated alkaloids 2–4 were established by X-ray crystal structure analyses. The insecticidal activity of the CHCl3, n-BuOH, and H2O parts of the H. lasiocarpum extract against Callosobruchus maculates and Sitophilus oryzae was examined. The CHCl3 extract at a dose of 10 mg/L had the highest activity.