A heliangolide, 3-hydroxyumbelliferone derivatives and diterpenes from Bahia ambrosioides

Abstract

The aerial parts of Bahia ambrosioides afforded several germacranolides and heliangolides one of which has not been reported previously. Furthermore, in addition to widespread compounds, four 3-hydroxyumbelliferone derivatives were present as well as two new diterpenes, an ent-kaurane diol and an ent-rosane diol. The structures were elucidated by high field NMR spectroscopy. The chemotaxonomic aspects are discussed briefly. © 1990.