Yellow Pigments, Fomitellanols A and B, and Drimane Sesquiterpenoids, Cryptoporic Acids P and Q, from Fomitella fraxinea and Their Inhibitory Activity against COX and 5-LO

Abstract

Yellow pigments, fomitellanols A (1a) and B (2a), and drimane-type sesquiterpenoid ethers of isocitric acid, cryptoporic acids P (3) and Q (4), have been isolated from the fruiting bodies of Fomitella fraxinea (Polyporaceae). Their structures were established by a combination of extensive NMR spectroscopy and/or X-ray crystallographic analyses, and their biological activity against COX-1, COX-2, and 5-LO was investigated.

Keywords

• Fomitella fraxinea
• Polyporaceae
• fomitellanol
• cryptoporic acid
• cyclooxygenase-1 (COX-1) and COX-2
• 5-lipoxygenase (5-LO)