title: 3-Hydroxydihydrobenzofuran glucosides from Gnaphalium polycaulon.
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.
authors: Chulabhorn Research Institute and Chulabhorn Graduate Institute, Bangkok, Thailand.
authors: Poolsak
authors: P
authors: Sahakitpichan
authors: Wannaporn
authors: W
authors: Disadee
authors: Somsak
authors: S
authors: Ruchirawat
authors: Tripetch
authors: T
authors: Kanchanapoom
mesh_terms: D001572:Benzofurans / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D036622:Gnaphalium / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D035261:Plant Components, Aerial / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D001572:Benzofurans; D005960:Glucosides