Carpesabrolide A, a novel meroterpenoid with anti-inflammatory activity from Carpesium abrotanoides†
Abstract
Carpesabrolide A (1), featuring an unprecedented fumaric acid–guaiane sesquiterpenoid hybrid, has been isolated from the folk medicinal plant Carpesium abrotanoides. The structure with absolute configuration has been established by spectroscopic methods and single crystal X-ray diffraction analysis. The plausible biosynthetic pathway for 1 is proposed. Compound 1 shows significant anti-inflammatory activity by inhibiting NO production with an IC50 value of 2.7 μM.