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Updated: Apr 2, 2026

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Polyprenylated Phloroglucinols from Hypericum maculatum.

Paraskev T Nedialkov, Georgi Momekov, Zlatina K Kokanova-Nedialkova

    Natural Product Communications
    |September 29, 2015
    PubMed
    Summary

    Phytochemical analysis of Hypericum maculatum yielded ten polyprenylated phloroglucinol derivatives, including four new compounds. These compounds were evaluated for their cytotoxic activity against specific tumor cell lines.

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    Area of Science:

    • Phytochemistry
    • Natural Products Chemistry
    • Organic Chemistry

    Background:

    • Hypericum species are known sources of bioactive compounds.
    • Polyprenylated phloroglucinols represent a class of natural products with diverse biological activities.
    • Detailed phytochemical studies are crucial for discovering novel chemical entities from medicinal plants.

    Purpose of the Study:

    • To conduct a comprehensive phytochemical investigation of the dichloromethane extract of Hypericum maculatum aerial parts.
    • To isolate and characterize new and known polyprenylated phloroglucinol derivatives.
    • To evaluate the cytotoxic potential of isolated compounds against selected human tumor cell lines.

    Main Methods:

    • Extraction and isolation of compounds using chromatographic techniques.

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  • Structure elucidation of new compounds employing spectroscopic methods (MS, NMR, IR, UV).
  • Cytotoxicity assessment using MTT-based assays on SKW-3, BV-173, and K-562 tumor cell lines.

    • Main Results:

    • Isolation of four new and six known polyprenylated phloroglucinol derivatives.
    • Full characterization of the new compounds (2-5) and identification of known compounds (1a/b, 6-10).
    • Determination of the stereochemistry of compound 1a for the first time.
    • Evaluation of the cytotoxicity of compounds 1-6 against the tested tumor cell lines.

    Conclusions:

    • The study successfully identified novel polyprenylated phloroglucinol derivatives from Hypericum maculatum.
    • The isolated compounds represent potential leads for further investigation in drug discovery.
    • The cytotoxic evaluation provides preliminary data on the anticancer potential of these natural products.