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  • Title: Structure elucidation and complete NMR spectral assignments of two new oleanane-type pentacyclic triterpenoid saponins from the husks of Xanthoceras sorbifolia Bunge.
    Author: Guo Y, Dou DQ, Kang TG, Wang SC, Kuang HX.
    Journal: Magn Reson Chem; 2009 Nov; 47(11):982-8. PubMed ID: 19629951.
    Abstract:
    Two new saponins were isolated from husks of Xanthoceras sorbifolia Bunge and their structures were elucidated as 3-O-[beta-D-galactopyranosyl(1-->2)]-alpha-L-arabinofuranosyl(1-->3)-beta-D-methyl glucuronic acid-21-O-(3,4-diangeloyl)-alpha-L-rhamnose-3beta, 16alpha, 21beta, 22alpha, 28beta-pentahydroxyl-22-acetoxy-olean-12-ene(1) and 3-O-[beta-D-galactopyranosyl(1-->2)]-alpha-L-arabinofuranosyl(1-->3)-beta-D-methyl glucuronic acid-21,22-O-diangeloyl-3beta,15alpha,16alpha,21beta,22alpha,28beta-hexahydroxyl-olean-12-ene(2) on the basis of 1D and 2D NMR (including (1)H, (13)C-NMR, (1)H-(1)H COSY, HSQC, HMBC and DEPT), ESI-MS spectrometry and chemical methods.
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