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  • Title: Stereochemical assignment of five new lignan glycosides from Viscum album by NMR study combined with CD spectroscopy.
    Author: Nhiem NX, Lee HY, Kim NY, Park SJ, Kim ES, Han JE, Yang H, Kim SH.
    Journal: Magn Reson Chem; 2012 Nov; 50(11):772-7. PubMed ID: 22996565.
    Abstract:
    The chemical study of the leaves and twigs of Viscum album led to the isolation of five new lignan glycosides, namely, ligalbumosides A-E (2-6) and one known lignan glycoside, alangilignoside C (1). The structures of five new lignan glycosides were determined to be (7R,8S,8'S)-4,9,4'-trihydroxy-3,5,3',5'-tetramethoxy-7,9'-epoxylignan 9-O-β-D-glucopyranoside (2), (7S,8S,7'S,8'R)-4,9,4'-trihydroxy-3,5,3',5',7'-pentamethoxy-7,9'-epoxylignan 9-O-β-D-glucopyranoside (3), (7R,8R,7'S,8'S)-4,9,4'-trihydroxy-3,5,3',5',7'-pentamethoxy-7,9'-epoxylignan 9-O-β-D-glucopyranoside (4), (7S,8R,7'S,8'R)-4,9,4'-trihydroxy-3,5,3',5',7'-pentamethoxy-7,9'-epoxylignan 9-O-β-D-glucopyranoside (5), and (7R,8S,7'R,8'S)-4,9,4',7'-tetrahydroxy-3,5,3',5'-tetramethoxy-7,9'-epoxylignan 9-O-β-D-glucopyranoside (6) using 1D-, 2D-NMR, and CD spectra, chemical methods, as well as comparing the results with those reported in the literature.
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