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Lignan Glycosides (lignan + glycoside)
Selected AbstractsA New Lignan and Four New Lignan Glycosides from Mananthes patentifloraHELVETICA CHIMICA ACTA, Issue 2 2006Junmian Tian Abstract A new lignan, 5-hydroxyjusticidin,A (=,9-(1,3-benzodioxol-5-yl)-5-hydroxy-4,6,7-trimethoxynaphtho[2,3- c]furan-1(3H)-one; 1), and four new diphyllin-type lignan glycosides, mananthosides C,F (2,5), containing glucosyl (Glc), arabinosyl (Ara), galactosyl (Gal), and/or apiosyl residues, have been isolated from Mananthes patentiflora, together with five known compounds. Their structures and configurations were elucidated by in-depth 1D- and 2D-NMR experiments, as well as MS analysis. [source] Phenylethyl Glycosides from Globularia alypum Growing in TurkeyHELVETICA CHIMICA ACTA, Issue 8 2008Hasan K, bekmez Abstract From the leaves of Globularia alypum, three new phenylethyl glycosides, namely galypumosides A (=2-(3,4-dihydroxyphenyl)ethyl O - , -rhamnopyranosyl-(1,3)-4- O -[(E)-caffeoyl]-6- O -[(E)- p -coumaroyl]- , -glucopyranoside; 1), B (=2-(3,4-dihydroxyphenyl)ethyl O - , -rhamnopyranosyl-(1,3)-4- O -[(E)-caffeoyl]-6- O -[(E)-feruloyl]- , -glucopyranoside; 2), and C (=2-(3,4-dihydroxyphenyl)ethyl O - , -rhamnopyranosyl-(1,3)-4- O -[(E)-caffeoyl]-6- O -menthiafoloyl- , -glucopyranoside; 3), were isolated, together with two known phenylethyl glycosides, calceolarioside A and verbascoside. Eight iridoid glucosides, catalpol, globularicisin, globularin, globularidin, globularinin, globularimin, lytanthosalin, and alpinoside, a flavon glycoside, 6-hydroxyluteolin 7- O -sophoroside, a lignan glycoside, syringaresinol 4,- O - , -glucopyranoside, and a phenylpropanoid glycoside, syringin, were also obtained and characterized. The structures of the isolates were elucidated on the basis of 1D- and 2D-NMR experiments as well as HR-MALDI-MS. [source] A New Lignan and Four New Lignan Glycosides from Mananthes patentifloraHELVETICA CHIMICA ACTA, Issue 2 2006Junmian Tian Abstract A new lignan, 5-hydroxyjusticidin,A (=,9-(1,3-benzodioxol-5-yl)-5-hydroxy-4,6,7-trimethoxynaphtho[2,3- c]furan-1(3H)-one; 1), and four new diphyllin-type lignan glycosides, mananthosides C,F (2,5), containing glucosyl (Glc), arabinosyl (Ara), galactosyl (Gal), and/or apiosyl residues, have been isolated from Mananthes patentiflora, together with five known compounds. Their structures and configurations were elucidated by in-depth 1D- and 2D-NMR experiments, as well as MS analysis. [source] Structure elucidation and NMR spectral assignments of three new lignan glycosides from Akebia trifoliataMAGNETIC RESONANCE IN CHEMISTRY, Issue 2 2008Shu-hong Guan Abstract Three new lignan glycosides (1,3) were isolated from the stems of Akebia trifoliata. Their structures were elucidated as (7R,8R,7,R,8,R)3,3,,5,5,tetramethoxy-4,4,dihydroxy-7,9,:7,,9-diepoxylignan-4- O -,- D -glucopyranoside (1), (7S,8S,8,R)-4,4,,9-trihydroxy-3,3,,5,5,-tetramethoxy-7,9,-epoxylignan-7,-one 9- O -,- D -glucopyranoside (2), (7R,8R,8,S)-4,4,,9-trihydroxy3,3,,5,5,-tetramethoxy-7,9,-epoxylignan-7,-one 9- O -,- D -glucopyranoside (3) by spectral analyses, primarily NMR, MS and CD. The NMR assignments for the compounds were carried out using 1H, 13C, DEPT, COSY, HSQC, HMBC and ROESY NMR experiments. Copyright © 2007 John Wiley & Sons, Ltd. [source] | ||||||||||