title: Two new lignans from the fruits of Schisandra sphenanthera.
abstract: Two new lignans, (8R,8'R)-8- hydroxy-3,4-dimethoxy-3',4'-methylenedioxy-7-oxolignan (1) and (7'R,8'S)-3,4-methylenedioxy-3',4'-dimethoxy -7,8-seco-7,7'-epoxylignan-7,8-dione (2), were isolated from the EtOAc extract of the fruits of Schisandra sphenanthera, along with ten known compounds. The structures of these compounds were elucidated on the basis of NMR and MS analysis. This is the first report of the occurrence of secolignans in Schisandra.
authors.affiliation: Provincial Key Lab of Rural Energy Engineering, Yunnan Normal University, Kunming 650092, People's Republic of China.
authors.forename: Chun Ren
authors.initials: CR
authors.lastname: Wang
authors.forename: Rong
authors.initials: R
authors.lastname: Sun
authors.forename: Chen Ren Ou
authors.initials: CR
authors.lastname: Yanga
authors.forename: Ye Gao
authors.initials: YG
authors.lastname: Chen
authors.forename: Hong Chuang
authors.initials: HC
authors.lastname: Song
mesh_terms: D002236:Carbohydrate Conformation; D002855:Chromatography, Thin Layer; D005638:Fruit / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010936:Plant Extracts / Q000737:chemistry; D032141:Schisandra / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: C546655:(7'R,8'S)-3,4-methylenedioxy-3',4'-dimethoxy -7,8-seco-7,7'-epoxylignan-7,8-dione; C546654:(8R,8'R)-8- hydroxy-3,4-dimethoxy-3',4'-methylenedioxy-7-oxolignan; D017705:Lignans; D010936:Plant Extracts