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[Triterpenoid sapogenins in the genus Grindelia]
S Kreutzer1, O Schimmer, R Waibel
1Institut für Botanik und Pharmazeutische Biologie der Universität Erlangen-Nürnberg, Federal Republic of Germany.
Planta Medica
|August 1, 1990
Summary
Researchers isolated a new natural compound, grindeliasapogenin D, from Grindelia plants. This triterpenoid sapogenin lactone was identified using advanced spectroscopic methods and contributes to the plant
Area of Science:
- Phytochemistry
- Natural Products Chemistry
- Organic Chemistry
Context:
- Grindeliae herba (Gumweed) is traditionally used for its medicinal properties.
- Saponins are a diverse class of natural compounds known for various biological activities.
- Previous research on Grindelia species has indicated the presence of bioactive compounds.
Purpose:
- To isolate and characterize saponins from Grindeliae herba.
- To elucidate the structure of novel sapogenins.
- To investigate the contribution of saponins to the antibiotic activity of Grindeliae herba.
Summary:
- A saponin fraction from Grindeliae herba exhibited significant haemolytic activity.
- A new triterpenoid sapogenin lactone, named grindeliasapogenin D (2β,3β,16α,23-tetrahydroxyoleanan-28,13β-olide), was isolated and structurally elucidated using mass spectrometry, NMR (1H, 13C), IR, and UV spectroscopy.
- Oleanolic acid and bayogenin were also identified as minor sapogenins in Grindelia robusta and G. lanceolata.
- The antibiotic activity of Grindeliae herba is primarily attributed to its resin fraction, not the saponins.
Impact:
- Discovery of a new natural product, grindeliasapogenin D, expanding the known repertoire of plant-derived compounds.
- Provides detailed structural information on sapogenins from Grindelia species.
- Clarifies the role of saponins versus resins in the medicinal properties of Grindeliae herba, guiding future research and applications.