3-Hydroxydihydrobenzofuran glucosides from Gnaphalium polycaulon |
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Authors: | Sahakitpichan Poolsak Disadee Wannaporn Ruchirawat Somsak Kanchanapoom Tripetch |
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Institution: | Chulabhorn Research Institute and Chulabhorn Graduate Institute, Bangkok, Thailand. |
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Abstract: | A new 3-hydroxydihydrobenzofuran glucoside, gnaphaliol 9-O-β-D-glucopyranoside (2), was isolated from the aerial parts of Gnaphalium polycaulon together with 1-{(2R*,3S*-3-(β-D-glucopyranosyloxy)-2,3-dihydro-2-1-(hydroxyl methyl)vinyl]-1-benzofuran-5-yl}-ethanone or gnaphaliol 3-O-β-D-glucopyranoside (1), (Z)-3-hexenyl O-β-D-glucopyranoside (3) and adenosine (4). The absolute configurations at C-2 and C-3 positions of compound 1 were determined to be 2R and 3R. The structures of these compounds were elucidated on the basis of their physical and spectroscopic data. |
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