Abstract
AbstractArillatanosides A–C are three triterpenoid saponins from Polygala arillata Buch–Ham that have been reported previously, but with partially incorrect structures. Further investigation of their NMR data led to the conclusion that the terminal α‐L‐arabinopyranosyl unit originally proposed for Arillatanosides A–C (I–III) is actually a β‐D‐xylopyranosyl unit. Thus, the correct structures of Arillatanosides A–C are represented by 1–3. Complete NMR assignments of Arillatanosides A–C (1–3) and the related polygalasaponin XXXV (4) were achieved using modern 2D NMR techniques, such as DQF H–H COSY, HMQC, HMBC, TOCSY, 2D HMQC–TOCSY. Copyright © 2002 John Wiley & Sons, Ltd.
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