Diterpenoids from Azorella yareta and their trichomonicidal activities

Abstract Diterpenoids with trichomonicidal activity were isolated from the aerial parts of Azorella yareta Hauman. One was 13β-hydroxyazorellane, together with the known constituents mulinolic acid, mulin-11,13-dien-20-oic acid, azorellanol and 13α-hydroxyazorellane. Their structures were determined by spectroscopic and chemical methods.