Harperoids A-F, Complex Polyprenylated Acylphloroglucinols from Harrisonia perforata that Reverse Multidrug Resistance by Targeting ABC Transporter Function.

Utilizing an LC/MS-MS-based feature-based molecular networking (FBMN) strategy, six undescribed PPAPs (1-6) characterized by an acetyl substituent at the C-1 position of their phloroglucinol scaffold, were efficiently isolated from the roots of Harrisonia perforata. Notably, compund 1 displays an unconventional 5/5/6/5 ring architecture, while compounds 5 and 6 represent the first case incorporating a benzofuran core and a geranyl-derived cyclohexanol unit. Their structures were unequivocally elucidated through comprehensive spectroscopic data analysis, TDDFT-ECD calculations, and X-ray crystallographic studies. Interestingly, compound 3 at 20 μM exhibited negligible cytotoxicity but significantly potentiated the activity of paclitaxel against HCT-15 cells by 42.8-fold. Mechanistic studies further demonstrated that compound 3 did not significantly alter the expression levels of ATP-binding cassette (ABC) transporters, but potently inhibited the transport function of both ABCB1 and ABCG2. Molecular docking reveals that compound 3 stably binds to the central substrate-binding cavities of ABCB1 and ABCG2, with its binding primarily stabilized by hydrogen bonds and hydrophobic interactions.

• Publication year

  2026

• Venue

  Journal of Organic Chemistry

• Publication date

  2026-02-09

• Fields of study

  Medicine, Chemistry

• Identifiers
  DOI 10.1021/acs.joc.5c03053PMID 41661059
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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