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Structure elucidation and NMR spectral assignments of three new lignan glycosides from Akebia trifoliata

✍ Scribed by Shu-hong Guan; Jia-meng Xia; Zhi-qiang Lu; Guang-tong Chen; Bao-hong Jiang; Xuan Liu; De-an Guo

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
211 KB
Volume
46
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Three new lignan glycosides (1–3) were isolated from the stems of Akebia trifoliata. Their structures were elucidated as (7__R__,8__R__,7′R,8′R)3,3′,5,5′tetramethoxy‐4,4′dihydroxy‐7,9′:7′,9‐diepoxylignan‐4‐O‐β‐D‐glucopyranoside (1), (7__S__,8__S__,8′R)‐4,4′,9‐trihydroxy‐3,3′,5,5′‐tetramethoxy‐7,9′‐epoxylignan‐7′‐one 9‐O‐β‐D‐glucopyranoside (2), (7__R__,8__R__,8′S)‐4,4′,9‐trihydroxy3,3′,5,5′‐tetramethoxy‐7,9′‐epoxylignan‐7′‐one 9‐O‐β‐D‐glucopyranoside (3) by spectral analyses, primarily NMR, MS and CD. The NMR assignments for the compounds were carried out using ^1^H, ^13^C, DEPT, COSY, HSQC, HMBC and ROESY NMR experiments. Copyright © 2007 John Wiley & Sons, Ltd.

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