has role independent continuant tertiary alpha-hydroxy ketone organic heterotricyclic compound triol antihypertensive agent triterpenoid labdane diterpenoid cyclic ketone forskolin CHEBI:42471 A labdane diterpenoid isolated from the Indian <em>Coleus</em> plant. acetate ester platelet aggregation inhibitor anti-HIV agent plant metabolite protein kinase A agonist adenylate cyclase agonist