Terpenes from Schisandra sphenanthera

Abstract One novel, highly oxygenated nortriterpenoid, schintrilactone C ( 1 ), and four known compounds, 2 – 5 , were isolated from the rattan of Schisandra sphenanthera. Their structures were determined by analysis of 1D‐ and 2D‐NMR spectroscopic data. Schintrilactone C is the third example of wuweiziartane‐type nortriterpenoids, bearing a modified five‐membered D ring, a δ ‐lactone E ring, and a spirocyclic moiety in the side chain at C(13).