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A new lanostane triterpenoid acid, nigranoic acid 3-ethyl ester (1), together with two known lanostane triterpenoid acids, isoschizandronic acid (2) and anwuweizic acid (3), was isolated from the stems of Schisandra henryi Clarke. The new compound was identified based on extensive spectroscopic studies including HR-ESI-MS and 2D NMR spectra, and the known compounds were identified by their spectroscopic...
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