ent-clerodanes and other constituents from bolivian Baccharis species

Investigation of seven Bolivian Baccharis species afforded in addition to known compounds 17 ent -clerodane, 10 ent -labdane, two bisabolene, a germacrane, a cadinane, a guaiane and a p -coumaric acid derivative. In one case the ent -labdane was linked with a bisabolene derivative via a malonate group. The structures were elucidated mainly by high field NMR techniques.