Longisglucinol A (1), a polycyclic polyprenylated acylphloroglucinol (PPAP) with a new skeleton, along with two new congeners, longisglucinols B (2) and C (3), were isolated from Hypericum longistylum. Compound 1… Click to show full abstract
Longisglucinol A (1), a polycyclic polyprenylated acylphloroglucinol (PPAP) with a new skeleton, along with two new congeners, longisglucinols B (2) and C (3), were isolated from Hypericum longistylum. Compound 1 features an unparalleled 6/6/6/5 fused ring skeleton based on a unique 8-oxa-tetracyclo-[8.3.3.01,9.03,7]cetane core. Longisglucinol A showed remarkable anti-inflammatory activity by inducing macrophage M2 polarization through the suppression of NF-κB.
               
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