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Bioactive neolignans from Endlicheria dysodantha.

W W Ma1, J F Kozlowski, J L McLaughlin

  • 1Department of Medicinal Chemistry and Pharmacognosy, School of Pharmacy and Pharmacal Sciences, Purdue University, West Lafayette, Indiana 47907.

Journal of Natural Products
|July 1, 1991
PubMed
Summary
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Two new hexahydrobenzofuranoid neolignans, dysodanthin A and B, were isolated from Endlicheria dysodantha. These compounds, along with two known neolignans, demonstrated significant cytotoxic and antitumor activities.

Area of Science:

  • Natural Product Chemistry
  • Medicinal Chemistry
  • Phytochemistry

Background:

  • The genus Endlicheria is a source of bioactive natural products.
  • Neolignans are a class of compounds known for diverse biological activities.
  • Investigating Endlicheria dysodantha can lead to the discovery of novel bioactive molecules.

Purpose of the Study:

  • To isolate and characterize new neolignans from Endlicheria dysodantha.
  • To evaluate the biological activities of isolated compounds, including cytotoxicity and antitumor potential.
  • To report the complete spectroscopic data for newly identified neolignans.

Main Methods:

  • Bioactivity-directed fractionation of the EtOH extract of Endlicheria dysodantha.
  • Isolation and purification of neolignans using chromatographic techniques.

Related Experiment Videos

  • Structural elucidation using 1H- and 13C-NMR spectroscopy.
  • Assessment of biological activities via brine shrimp lethality test, crown gall tumor inhibition assay, and human tumor cell line cytotoxicity assays.

    • Main Results:

    • Dysodanthin A and dysodanthin B, two new hexahydrobenzofuranoid neolignans, were isolated.
    • Two known neolignans, a burchellin analogue (compound 4) and megaphone acetate [1], were also identified.
    • All four isolated neolignans exhibited activity in the brine shrimp lethality test.
    • Compounds 1-3 demonstrated inhibition of crown gall tumor growth and cytotoxicity against human tumor cells in culture.

    Conclusions:

    • This study reports the first isolation of these specific neolignans from the genus Endlicheria.
    • The complete 1H- and 13C-NMR data for the novel neolignans were fully assigned.
    • The isolated neolignans possess significant cytotoxic and potential antitumor properties, warranting further investigation.