Three ent-trachylobane diterpenes from the leaf exudates of Psiadia punctulata

Three ent-trachylobane diterpenes, including 1, have been isolated from the leaf exudates of Psiadia punctulata and characterised as 6α,18,19-ent-trachylobantriol (1), 2α,18,19-ent-trachylobantriol and 2β,6α,18,19-ent-trachylobantetraol. The structures were determined on the basis of spectroscopic evidence.