Two lignan rhamnosides from birch leaves |
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| Authors: | Yanbo Shen Yasuo Kojima Minoru Terazawa |
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| Institution: | (1) Faculty of Agriculture, Hokkaido University, 060-8587 Sapporo, Japan |
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| Abstract: | The extractives of shirakamba (Betula platyphylla Sukatchev var.japonica Hara) leaves were investigated. Two lignan glycosides were isolated, and their structures were elucidated to be 1-(4 -hydroxy-3-methoxyphenyl)-2-1 -(3- -l-rhamnopyranosyloxypropyl)-3-hydroxyphenoxy]-1,3-propanediol (I) and a new 2,3-dihydro-2-arylbenzofuran configuration neolignan,cis-2,3-dihydro-2-(4--l-rhamnopyranosyloxy-3-methoxyphenyl)-3-hydroxymethyl-7-hydroxy-5-benzofuranpropanol (II). These neolignan rhamnosides were newly found in shirakamba. |
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| Keywords: | Lignan Rhamnoside Birch Betula platyphylla Sukatchev var japonica Hara |
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