New acyclic 12-hydroxygeranylgeraniol-derived diterpenoids from the seeds of Carpesium triste
Five new acyclic 12-hydroxygeranylgeraniol-derived diterpenoids, i.e., 1-5, were isolated from the seeds of Carpesium triste. The structures including the absolute configurations of the new compounds were elucidated by spectroscopic methods. All the compo