Abstract: Schisandra rubriflora Rehd. et Wils. is a traditional Chinese medicine. To search for new and bioactive components from traditional Chinese medicines and provide scientific evidence for taxonomy, the chemica...Abstract: Schisandra rubriflora Rehd. et Wils. is a traditional Chinese medicine. To search for new and bioactive components from traditional Chinese medicines and provide scientific evidence for taxonomy, the chemical constituents of the plant were investigated by various column chromatography methods (silica gel, Sephadex LH-20, and RP-18). From the aerial parts of S. rubriflora, three new megastigmane glycosides, namely (3S, 5R, 6S, 9R)-megastigmane-3, 9-diol 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (1), 7-megastigmene-3-ol-9-one 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (2), and megastigmane-3α, 4β, 9σ-triol 3-O-β-D-glucopyranoside (3), along with 14 known compounds, were isolated. The structures of the new compounds were elucidated by a combination of spectroscopic and chemical methods.展开更多
The contents of flavonoid in the leaf and stem of Sargentodoxa cuneata (Oliv.) Rehd. et Wils. were determined. In a whole growth season, the dynamic chang of flavonoid in the leafblade of S. cuneata showed the two-pea...The contents of flavonoid in the leaf and stem of Sargentodoxa cuneata (Oliv.) Rehd. et Wils. were determined. In a whole growth season, the dynamic chang of flavonoid in the leafblade of S. cuneata showed the two-peak pattern. The first peak appeared at June and the second at September. The seasonal dynamic change of flavonoids in leafstalk, annual twig and perennial stem were different and inconspicuous. The flavonoid cumulated maximally in the leafblade and the followed was seccessively annual twig, leafstalk, and perennial stem. The flavonoid content in leafblade was 31.79 mg/g(DW), while that in annual twig, leafstalk and perennial stem was 5.41 mg/g(DW), 5.30 mg/g(DW) and 3.95 mg/g(DW) respectively. There was markedly higher flavonoid content in leafblade. It is considered that the leaf of Sargentodoxa cuneata is significant in further exploitation.展开更多
文摘Abstract: Schisandra rubriflora Rehd. et Wils. is a traditional Chinese medicine. To search for new and bioactive components from traditional Chinese medicines and provide scientific evidence for taxonomy, the chemical constituents of the plant were investigated by various column chromatography methods (silica gel, Sephadex LH-20, and RP-18). From the aerial parts of S. rubriflora, three new megastigmane glycosides, namely (3S, 5R, 6S, 9R)-megastigmane-3, 9-diol 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (1), 7-megastigmene-3-ol-9-one 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (2), and megastigmane-3α, 4β, 9σ-triol 3-O-β-D-glucopyranoside (3), along with 14 known compounds, were isolated. The structures of the new compounds were elucidated by a combination of spectroscopic and chemical methods.
文摘The contents of flavonoid in the leaf and stem of Sargentodoxa cuneata (Oliv.) Rehd. et Wils. were determined. In a whole growth season, the dynamic chang of flavonoid in the leafblade of S. cuneata showed the two-peak pattern. The first peak appeared at June and the second at September. The seasonal dynamic change of flavonoids in leafstalk, annual twig and perennial stem were different and inconspicuous. The flavonoid cumulated maximally in the leafblade and the followed was seccessively annual twig, leafstalk, and perennial stem. The flavonoid content in leafblade was 31.79 mg/g(DW), while that in annual twig, leafstalk and perennial stem was 5.41 mg/g(DW), 5.30 mg/g(DW) and 3.95 mg/g(DW) respectively. There was markedly higher flavonoid content in leafblade. It is considered that the leaf of Sargentodoxa cuneata is significant in further exploitation.