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).
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Jiang et al. (2011) studied this question.
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