New terpenoids from Resina Commiphora.

Three new eudesmane sesquiterpenoids, commiphoranes E1-E3 (1-3), a new podocarpane diterpenoid, commiphorane F (4), three new triterpenoids, commiphoranes G1-G3 (5-7), and fourteen known terpenoids (8-21) were isolated from Resina Commiphora. The structures and relative configurations of new compounds were mainly assigned by spectroscopic methods. In particular, the absolute configuration of 3 was clarified by computational methods. Renoprotective effects of all these isolates were evaluated by using an ELISA assay in TGF-β1-induced rat kidney tubular epithelial cells. The present findings add new facets for chemical profiling of plant resins.