Structure elucidation and NMR spectral assignments of three new lignan glycosides from Akebia trifoliata |
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| Authors: | Guan Shu-Hong Xia Jia-Meng Lu Zhi-Qiang Chen Guang-Tong Jiang Bao-Hong Liu Xuan Guo De-An |
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| Affiliation: | Shanghai Research Center for TCM Modernization, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai Zhangjiang Hitech Park, Guoshoujing Road #199, Shanghai 201203, P.R. China. |
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| 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-beta-D-glucopyranoside (1), (7S,8S,8'R)-4,4',9-trihydroxy-3,3',5,5'-tetramethoxy-7,9'-epoxylignan-7'-one 9-O-beta-D-glucopyranoside (2), (7R,8R,8'S)-4,4',9-trihydroxy3,3',5,5'-tetramethoxy-7,9'-epoxylignan-7'-one 9-O-beta-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. |
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| Keywords: | NMR 1H 13C lignan glycosides Akebia trifoliata |
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