Thermlanseedlines A-G, seven thermopsine-based alkaloids with antiviral and insecticidal activities from the seeds of Thermopsis lanceolata R. Br

Fitoterapia. 2022 Apr:158:105140. doi: 10.1016/j.fitote.2022.105140. Epub 2022 Feb 2.

Abstract

Seven undescribed thermopsine-based alkaloids (1-7), including one undescribed biogenetically related intermediate (7), were isolated from the seeds of Thermopsis lanceolata R. Br. Compound 1 possessed a 6/6-6 tricyclic skeleton, while compounds 2-6 represented three rare dimerization patterns constructed by quinolizidine alkaloids. Their structures were elucidated by comprehensive spectroscopic data analysis as well as ECD calculations. Biologically, compound 6 displayed significant anti-Tomato spotted wilt virus (TSWV) activity compared with the positive control ningnanmycin. Moreover, compound 1 exhibited good insecticidal activity against Aphis fabae with LC50 value of 25.2 mg/L.

Keywords: Anti-TSMV; Insecticidal activity; Quinolizidine alkaloids; Thermopsis lanceolata R. Br..

MeSH terms

  • Alkaloids* / chemistry
  • Antiviral Agents / chemistry
  • Antiviral Agents / pharmacology
  • Insecticides* / chemistry
  • Insecticides* / pharmacology
  • Molecular Structure
  • Seeds / chemistry

Substances

  • Alkaloids
  • Antiviral Agents
  • Insecticides