title: Two new dihydrobenzofuran lignans from Rabdosia lophanthoides (Buch.-Ham.ex D.Don) Hara.
abstract: Two new dihydrobenzofuran lignanosides, (7R,8S)-4,3',9'-trihydroxyl-3-methoxyl-7,8-dihydrobenzofuran-1'-propylneolignan-9-O-(6-O-syringoyl)-beta-D-glucopyranoside, named lophanthoside B (1) and (7R,8S)-4,9,9'-trihydroxyl-3-methoxyl-7,8-dihydrobenzofuran-1'-propylneolignan-3'-O-beta-D-glucopyranoside (2), an enantiomer of umbroside, along with four known dihydrobenzofuran lignans (3-6), were isolated from 50% acetone extract of Rabdosia lophanthoides (Buch.-Ham.ex D.Don) Hara. Their structures were elucidated by NMR and MS experiments.
authors.affiliation: School of Pharmaceutical Science, Henan University of Traditional Chinese Medicine, Zhengzhou, China. fwsh@hactcm.edu.cn
authors.forename: Wei-Sheng
authors.initials: WS
authors.lastname: Feng
authors.forename: Xin-Yu
authors.initials: XY
authors.lastname: Zang
authors.forename: Xiao-Ke
authors.initials: XK
authors.lastname: Zheng
authors.forename: Yan-Zhi
authors.initials: YZ
authors.lastname: Wang
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
mesh_terms: D001572:Benzofurans / Q000737:chemistry / Q000302:isolation & purification*; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D037602:Isodon / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013237:Stereoisomerism
chemical_list: C551206:(7R,8S)-4,9,9'-trihydroxyl-3-methoxyl-7,8-dihydrobenzofuran-1'-propylneolignan-3'-O-beta-D-glucopyranoside; D001572:Benzofurans; D004365:Drugs, Chinese Herbal; D006027:Glycosides; D017705:Lignans; C551207:lophanthoside B