Diterpenoids with trichomonicidal activity were isolated from the aerial pa
rts of Azorella yareta Hauman. One was 13 beta -hydroxy-azorellane, togethe
r with the known constituents mulinolic acid, mulin-11,13-dien-20-oic acid,
azorellanol and 13 alpha -hydroxyazorellane. Their structures were determi
ned by spectroscopic and chemical methods. (C) 2001 Elsevier Science Ltd. A
ll rights reserved.