DITERPENES FROM BACCHARIS SPECIES

Article abstract of DOI:10.1016/0031-9422(81)84033-2

The investigation of ten Baccharis species afforded in addition to known compounds eight new diterpenes, four ent-labdanes, three kaurenes and a clerodane derivative.Furthermore, two new p-hydroxyacetophenones, a flavone, 3'-methoxyxanthomicrol and two matricaria ester derivatives were isolated.The structures were elucidated by spectroscopic methods and a few chemical transformations.The chemotaxonomic situation of the large genus is discussed briefly. - Keywords: Baccharis species; Compositae; diterpenes; ent-labdanes; clerodane; ent-kauranes; p-hydroxyacetophenone derivatives; acetylenes; flavone; 3'-methoxyxanthomicrol.