Tolypodiol, an Antiinflammatory Diterpenoid from the Cyanobacterium Tolypothrix nodosa

Abstract
A new diterpenoid, tolypodiol (1), has been isolated from the terrestrial cyanobacterium Tolypothrix nodosa (HT-58-2) and identified by NMR and mass spectral analysis. The monoacetate derivative 2 was prepared. Tolypodiol (1) and its monoacetate derivative 2 show potent antiinflammatory activity in the mouse ear edema assay.